"On this high-flying episode of "Mythbusters"..." "One word for this... splat!" "...the whole team tackles one massive myth." "Everything in your mind is saying, "Don't do it. "" "Testing the tale of a spectacular midair mishap pushes everyone to the limit." "This whole story is just totally absurd." "They'll need luck..." "For science." " Aaaah!" " ... courage..." "Ah!" "This is the best data ever!" "...and some serious science..." "That's perfect." "...to tackle the myth of the man who fell to earth..." "Grant, take it away." "...struck a seesaw, and launched a legend." "Who are the Mythbusters?" "Adam Savage and Jamie Hyneman." "You just need a little extra lubrication." "Between them, more than 30 years of special-effects experience." "I'm taking me Jamie out for a walk." "Joining them..." "Tory Belleci..." "Freedom!" "...Grant Imahara..." "Let's go!" "Come on!" "I'm gonna be rich!" "...and Kari Byron." "That was a rush!" "They don't just tell the myths." "They put them to the test." "A little old for dolls, aren't we?" "This is not a doll." "This is a demonstration model for the next story we've got to do, which comes right from the fan site." "Okay, tell me more." "I'm a skydiver, right, and I'm falling through the air and my parachute has utterly failed." "Looking desperately down at the ground for something to break my fall, I spy a children's playground and a seesaw with a little girl at the other end." "Not worrying about her, I aim for this end of the seesaw, go straight upright at the last second." "I hit the seesaw and catapult that poor little girl up to the top of a seven-story building, where, amazingly, she lands safely." "Wow." "Sounds almost too good to be true." "I thought the same thing." "Improbable, yes." "But impossible?" "Parachutes do sometimes fail to open." "If he's jumping over a town or city, it's feasible he could drop over a playground." "Common sense and basic physics tells us that if he hits the seesaw, that lonely little girl is going somewhere." "But seven stories high, and she lives?" "Well, don't knock it till you've tried it." ""Jamie, I don't know about you, but I feel like we could just go for this one. "" "Sure, we can do it right outside." "All we need is a regulation seesaw." "And a correctly weighted little girl." "And a skydiver." "Terrific." "Let's do it." "When I was a kid, seesaws were long wooden planks, and that's what we started looking for." "But it turns out no one makes those anymore." "Now seesaws are made out of steel, and there are as many designs as there seem to be playgrounds." "So we have chosen a mid-range, middle-of-the-road, simple steel seesaw, and that's what I'm about to build." "For Adam, building a two-kid plaything is a one-man job." "Inside 30 minutes, he welds a central pivot from 2-inch pipes and a couple of elbow joints." "The bench itself is just a 10-foot slab of hollow steel." "Now I've just got to attach one to the other." "So far, so good." "But then Adam finds a fatal flaw in the foundations." "There's no kid that wants to go that high." "After a quick nip/tuck, we've got a working seesaw, a simple device that just might flip an unsuspecting 6-year-old seven stories high." "Much better." "But here's the problem." "To hit terminal velocity, the unlucky skydiver would have to fall from at least 600 feet." "So to get around that problem, at least for this first test, what I'm doing is trading altitude for weight." "When I fill these barrels with water, they'll be much heavier than a man, so we can then drop them from a much lower height and get a more or less guaranteed hit." "And the impact force should be exactly the same." "That's the theory, and they can't wait to put it into practice, so they've picked a drop zone that's real close to home... the parking lot behind M5." "And that's just getting welded down at the plate?" " Yeah." " Okay." "It's a stunt that will scare the neighbors." "Given the massive forces at play, only a lunatic would choose this moment to trial a new technology." "This quick release, which holds up to 10,000 pounds, is gonna be the mechanism by which we drop our weight on the seesaw." "And normally we'd use it in a "pull on a wire" mode." "Now it's got an automatic cylinder release, which, when we connect a battery from our viewing site, and I say, "Connect the battery" it's gonna drop the weight right on our seesaw." "Now for the checklist." "They've got the crane." "They've got the weight." "And Adam's built a teeter-totter that both sees and saws." "Okay, so it is, in fact, a seesaw." "It is, in fact, a seesaw." "I want one of these in my office." "All we need now is a full-scale victim, and this one is almost too cute to catapult." "Almost." "So, shall we name her "Ariel"?" "Nice call, Jamie, but it's best not to get too attached to your missiles." "Our little girl over here is supposed to be an average 6-year-old, and so we've made her weight 50 pounds." "Now, if the physics in this story are correct, the water barrels, when they hit this end of the seesaw, are gonna launch her straight up about 70 feet, or 7 stories." "I've calculated that filling the barrels with 1, 150 pounds of water and then dropping them from 75 feet should exactly match the skydiver's free-fall impact force of 85,000 foot-pounds." "The foot-pound is a standard gravitational measurement." "It's the energy expended by a force of one pound acting through a distance of one foot." " Looks good to me." " All right." "Let's go up." "The numbers look good on paper, but let's see how it all pans out on the pavement." "So, I'm gonna pull the safety, but you know what?" "I don't want to be anywhere on this lot when we drop this thing." "I was thinking we should be up over there." "I was thinking the same thing." "So with the elements in place," "Adam and Jamie head for the high ground." "Right now I'd describe the situation as "mayhem in potentia. "" "Soon we'll have actual mayhem." "And that actual mayhem is now just moments away." "All right, here we go..." "skydiver seesaw." "In 3, 2, 1." "Aw, darn." "The seesaw broke." "It just kind of like folded in half." "The bench is buckled, but the full extent of this disaster is best assessed from ground level." "I don't think we've ever done this specific kind of damage." "What do you mean?" "A little bending and welding." "And it will be good as new." "Look, you can see where..." "That's exactly where it hit the rebar handle." "Yeah." "Which is, like, flattened as flat as it could be." "It not only crushed it right at the pivot point, but it also crushed it right at the end here." "So, you know, that's a heck of a lot of force." "A lot more than we considered." "We're gonna have to rethink this thing." "Yeah." "Even if this was a solid bar of steel," "I don't think it would have taken it." "Yeah." "I swear, this is the best part of the job... reviewing the high-speed footage." "I want to see if she even comes off the ground." "Oh, I think she does." "I saw her flip a couple of times." "Little Ariel launched at exactly 23 miles per hour and then flew 20 feet high." "What goes up..." " Come back!" " must come down." "Here it is." "That's barely two stories, way short of the mythical seven." "But with all the substitutions, this test was always more likely to be an indication than an indictment." "I can't help but feel this nagging feeling in my head that there's a big difference between 1,000 pounds of water in steel cans and a soft, 100-and-some-odd-pound skydiver falling at terminal velocity." "We've got a lot of rethinking to do to really call this one." "This thing right here..." "It already buckled." "And so, all of that energy has been wasted." "Now we need to figure out, if we're gonna make this work, how to get all of that energy over there to come over here to the little girl without wasting itself on breaking things in the process." "In short, the fact that a home-built seesaw cracked under the weight of three sharp-edged barrels doesn't prove or disprove the myth." "And with the help of Tory, Grant, and Kari, things will get better." "The common playground seesaw is about as safe or as dangerous as you want to make it." "But could it really toss a girl on top of a seven-story building?" "Well, it flipped an elephant, right?" "Dude, there is a lot to do in this myth." "Yeah, there is, but I'm ahead of you." "Reinforcements should be arriving... now." " What do you need?" " Okay." "You know the seesaw myth that we're working on?" " Yeah." " We need a way, first, to calculate the terminal velocity of our skydivers." "Specifically in the myth, it stated that he is wearing a camera suit." "That's a specific kind of skydiving suit." "We need to know how fast he's going." "Okay, cool." "What else?" "Well, we need to have a delivery system for the skydiver to put him on target at terminal velocity." "A giant crane?" "We'll figure it out." "All right." "We'll see you later." " "We'll figure it out. "" " I don't know." "I just went blank." "Great." "Always have to be the hero." "So on the very next misty morning, the team arrives at SkyDance SkyDiving to see just how slowly a man can fall in a camera suit." "Grant's our designated diver, and Nick Armstrong's here to point him in the right direction... down." " So, this is the camera suit?" " Yes, it is." "Can you tell us a little bit about it?" "Sure." "It's different from most of our skydiving suits in that it's built specifically for videographers." "The key design difference is a wing-like flap from the elbows to the hips that should give added air resistance." "So you can get a lot slower with one of these suits on?" "Absolutely." "Grant's not licensed to go solo, so he's doing a tandem jump." "Nick's wearing the camera suit and a fancy Altitracker wrist computer to log the details of his descent." "He and Grant are both gonna go up." "They're both gonna jump at the same time." "And when Grant gives Nick the signal, he's gonna spread out as far as possible to see if he can slow down his descent." "And when he gets off the plane, I'm going to take that, download it into a computer." "We'll have a graph that'll tell us all the speeds." "Now, after Nick is done with the spread-eagle position, then he's gonna try flapping his wings." "Is flapping your wings gonna make you slow down more?" "I don't know." "Maybe it'll take your mind off the fact that you're falling without a parachute." "For a veteran skydiver, flapping your wings sounds a touch undignified, but it's worth a shot." "Grant's just happy be here." "This is one of those great opportunities on this show to do something that's reasonably dangerous, but in relative safety." "I'm very excited to try this out again." "This will be my second sky-dive." "Hope things go great." "So do we, buddy." "When the plane hits 2 miles high, the passengers push off." "Once the guys get situated," "Nick initiates part one of the test... spreading those tiny wings." "The result is just as predicted..." "Relative to Grant, he does seem to reduce his speed." "A few seconds later, Nick tries flapping like a giant pelican to see if that slows him down." "Yep." "Team Imahara makes a perfect 4-point landing." "Nicely done." " You're safe and sound." " You made it." "And our eye in the sky has a fair idea of what worked and what didn't." "So, he opened up his arms, and he was gone, just like that." "So when he reset and tried to start flapping, how did that go?" "Yeah, I saw him come back down when he started flapping his arms, and he was just falling at the same speed I was." "To confirm Grant's account," "Kari downloads the data from Nick's wrist computer, and the graph couldn't be more clear." "When Nick opened up his camera suit and went completely spread out so he had the most surface area, he slowed down to about 114 miles an hour." "But over here, this is where he started flapping his wings like a cartoon to see if he could slow down, you know, Goofy-style." "That didn't seem to work too well." "So 114 miles per hour looks like the speed to aim for." "But Grant's remembered a crucial part of the story they've overlooked, so Tory needs to suit up." "We need to send Nick up again because the myth specifically said the skydiver tried to land on his feet." "In other words, he fell spread-eagled like the last test, but then at the last second, tried to land the jump, and I'm guessing that even if the guy only went perpendicular for a second or two," "it could significantly change the speed at which he hit the seesaw." "All right, here we are again, putting our lives on the line for science." "But don't get me wrong." "I love skydiving." "But I've only been two times, so maybe that's natural." "Ready, set..." "They all assume the standard frog position." "It takes 10 full seconds and at least 600 feet of free fall to reach terminal velocity." "Then Nick tries going vertical." "It's harder than it looks." "A few seconds later, he tries again." "Hopefully Nick stayed upright long enough for the computer to register any change in velocity." "And if Grant was right, that brief moment of verticality will affect the speed at impact." "Then at the last second, he tries to land on his feet." "He kind of closes up into a smaller position, and his speed shoots up a little bit." "But since it's only 1 second, he gets to about 122 miles an hour." "Now, that is the important number right there because that's gonna be the final speed at which he hits the seesaw." "For just the second time in Mythbusters history, the whole team has pulled together to test one fantastic fable..." "the skydiver who hit a seesaw and sent a little girl seven stories high." "If that's not too hard to swallow, the myth says she survived the adventure." "But that car-park catastrophe still haunts Adam." "It's not looking good for this myth, man." "I mean, if our regulation seesaw made of steel can't come close to handling the forces, can't transfer the energy from the skydiver to the little girl, then this thing's busted before we've seen anything fly." "Yeah, the forces involved are really enormous, but there's nothing stopping us from improving on that design, making one that's indestructible... a super seesaw." "We can build the mother of all seesaws." "I love it." "And then if it holds together, the girl might just fly." "She might." "And Jamie has some grand plans." "It may not be the best seesaw ever... who knows what NASA has locked away?" "... but he's aiming high." "We want to exactly be done with delivering the load from the incoming projectile right before it hits the ground." "But why scribble when you've got the software to design and test the concept?" "We're using SolidWorks software here, which I've had for a while, but I've never really been able to use it to its full potential." "The beauty of something like this is that it really allows me to push the limits of the material and the design because it doesn't matter if the design breaks on the computer." "I'll just pull up another one and change it a little bit and try again." "And that way, by the time I get around to building the real thing, I already know it's gonna work." "Jamie's decided to build his bench in two parts, both hinged on a pivot." "Where does that put us as far as our yield strength?" "The big picture here is to maximize the energy transfer from the falling man to the girl and to keep the seesaw intact." "So I started thinking about, "What do I know that is really massively strong and lightweight?"" "And so what I came up with was a construction crane, like this toy here." "Instead of relying on something to not bend, they put a cable across the top of it so the load that's being experienced is on that cable, and instead of a bending force on this spar structure here," "you've got a compressive load." "It's hard to see here, but the load is this way." "And so you end up with something that's able to build whole buildings, and yet there's really not a whole lot there." "The next few hours sees Jamie and a small team of experts refine the design." "Any kind of offset would cause a twisting sort of a thing that it would be a problem." "While Jamie thinks big, Adam goes small scale to get some idea of what to look for when they try this again at full force." "Building a toy teeter-totter is easy-peasy, and, I don't know, kind of wholesome, you know?" "Filling a muscleman body with lead shot is kind of strange." "But capping it off with a baby-doll head is just plain weird." "Still, it should do the job." "What I've got here is a scale model of our seesaw rig." "This is our little girl, as creepy as she looks, and this is our skydiver, as much as it looks like a round ball." "They are the equivalent weight relationship of our real skydiver and our real girl... about 31/2 to 1." "What I want to investigate with this is, what happens to her when the skydiver hits the seesaw?" "If the seesaw doesn't break, where does she go?" "What is her trajectory, and what can I predict about her trajectory?" "So Adam starts test number one from 10 feet up on the scissor lift." "A plumb line indicates the perfect drop point, and it's bombs away." "3, 2, 1." "Oh, God, that's one of the best high-speed shots ever." "I dropped the weight from about 10 feet up." "She smacked into that lamp at a pretty high speed, which means she's going higher in the air than the lead weight is starting from." "That tells me there might really be something to this." "So Adam installs a scale that measures the drop height at 6-inch intervals." "30 inches." "He starts out from just 30 inches." "3, 2, 1." "Dropping from 36 inches." "For such a simple test, this one is giving me tons of data... and good data." "42 inches." "Number one, I think she might actually make it to the roof of that seven-story building or higher." "Here we go with 48." "Secondly, I'm noticing her flight characteristics." "She is pretty much staying in line with the seesaw..." "Wow!" "...either landing where she took off from or landing around the center of the seesaw." "That gives me a really good bead on where we can all safely be when we're watching this thing happen in full scale." "Dropped from a height of 36 inches..." "When he's done," "Adam checks the replays to log the stats." "42." "And the big graph confirms his optimism." "Hey, dude." "Check this out, man." "Higher." "When the dots are joined, the line shows a compound increase that's hard to ignore." "When I dropped the weight from 54 inches, she flew 8 feet into the air." "Wow." "I'm looking at this, I think she might actually make it to the top of this seven-story building." "But a full-scale girl won't hit those dizzy heights without Jamie's super seesaw." "They've got the parts, and now they have to put it together." "Obviously, we like the complex engineering challenges." ""Lead Balloon. "" ""Shredded Plane. "" "Yeah!" ""Ping-Pong Rescue. "" "Yeah, it worked!" "Whoo!" "This is the first time we've ever resorted to computer simulations for calculating the huge amounts of energy we're dealing with." "When that skydiver hits our seesaw, it has to transfer all of its energy... all of his energy..." "to the girl." "And everything that we've done thus far says that this will do that." "I'll believe it when I see it." "This is one of two trusses that will make the seesaw, and even without welds on it, it's really strong." "We're not only using a different material." "In this case, we're using chromoly steel." "We're using a different configuration of it as well." "The way these joints kind of grab all of the other members..." "It's gonna be really, really sturdy once we get it all welded." "This thing that looks like a maximum-security birdhouse is, in fact, the vital fulcrum." "The trusses like this are gonna be welded onto here, and this is where the pivoting happens." "It's got to be really strong because there's gonna be one heck of a lot of weight hitting it." "And if this engineering marvel breaks, the girl, just like the myth, ain't going nowhere." "In just two days, belief in the myth of a skydiver hitting a seesaw and shooting a small girl 70 feet high has waned..." "We're gonna have to rethink this thing." "...and waxed." "Wow!" "Jamie's super seesaw looks promising, but now they need to find a way to accelerate a full-weight dummy to terminal velocity and hit the target." "Okay, so now we know the speed that Buster has to fall to hit the seesaw..." "just over 120 miles an hour." "Yeah, but there's a problem." "We need at least 600 feet to get to that speed." "600 feet?" "Do you know how hard it's gonna be to hit a target dropping Buster from 600 feet?" "Yeah, so we need to figure out a way that Buster could fall faster than gravity at a reasonable distance like 100 feet and still hit the "X."" " What about bungee?" " Bungee?" "Yeah, we do like a reverse bungee where we attach Buster to one end of the bungee, we anchor the other end, then we stretch him up and release him." "It hits the target every time." "Fresh from skydiving school," "Grant and Tory head for the hills to try another extreme sport." "Again, it's all in the name of scary science." "You know, we got close on border slingshot, but we've never actually used bungee in an experiment." "Yeah, it's a good idea, but is it gonna get our skydiver up to 122 miles an hour?" "Well, you know there's only one way to find out." " We're gonna have to jump, huh?" " Yep." "The method behind this madness is to see if a giant bungee cord could work in reverse to slingshot a skydiver simulate to that magic mark of 122 miles per hour." "Now, I have never bungee-jumped myself before." "I've used it to strap things together, but I've never actually depended on it to keep me from dying." "Uh..." "And they're both trusting their lives to this woman." "So, what are these wristbands for?" "Because, you know, sometimes the bodies are horribly disfigured and it's to identify them." " Are you joking?" " I am joking." "They're actually so that we get you in the right weight class so that you don't get whiplash or touch the river." "After the pep talk, McKenzie spills the figures that have special relevance to this myth." "On your way down, you will be going at 68.3 miles an hour." "And then when you come back up, you'll be going 70. 1 miles an hour." "You're coming up faster than you went down." "It's that reverse thrust they're looking for." "One, two, you!" "Tory's the first to take the plunge." "Don't worry, buddy." "It'll all be over in a few minutes." "I know." "That's what I'm worried about." "Remember, go big." "You cannot dive too hard or too far." " Oh, man." " Go big." "Oh, man!" "Or here's a thought..." "Just go!" "Aaaah!" "Whoa-oa-oa!" "It sure looks like Tory rebounded faster than he fell." "At least he had fun." "Everything in your mind is saying, "Don't do it. "" "Aaaah!" "And then once you get over that fear to do it, then there's like this sensation of all your guts going into your mouth." "Aaaah!" "And then you hit the bottom, and you bounce up, and you do it a couple more times." "So it's like..." "It continues." "Aaaaaah!" "And while Tory's concerned with the state of his guts," "Kari's about to be up to her elbows in someone else's." "This is going to be my falling parachutist." "Now, to make him, we need something that's going to emulate the human body, which is approximately 75% water to 25% solid materials." "Now, to do that, we're going to use an alginate." "This is used for life casting, taking impressions when you go to the dentist's office." "We're going to fill this wet suit with the wet alginate and hopefully we are going to have the perfect analogue for the human body to fall on our seesaw." "In short, he'll go splat just like a real man." "And Kari's figured the average athletic weight at 171 pounds." "Kind of feels like guts." "And, yes, I do know what guts feel like." "I've been on the show for years." "I believe I'm in the butter zone for the weight of my parachutist, but at this point, I can't lift any more, and it's time to weigh in." "I need to find out how much weight he needs to make him perfect." "So I'm going to go look around the shop and see if anybody's stronger than I am." "It's Jamie's fate to carry the load, assuming he can lift it." "Oh, geez." "Aah!" "They finally do make the scales." "Jamie's already weighed in at 180 pounds, so they'll subtract his bulk from the total." " So, how much?" " It's good." "It looks like we only need about another 20 pounds, and I haven't done the feet or the hands yet, so I think we're right in the zone for the body." "Okay, so that was only about what?" "150." " Really?" " Yeah." "I'm getting old." "Back on the bungee bridge, it's Grant's turn." "Yeah, I selected cremation." " Good choice." " Okay." "Thanks." "He jumps the rail, finds the platform, then takes a last deep breath." "For science." "Aaaah!" "Whoa!" "Oh, yeah!" "Whoo!" "Ah!" "This is the best data ever!" "Whoo." "Let's hope so." "Both Grant and Tory are trying to feel the pulling power of the bungee." "Well, I think this is really gonna work." "I could really feel the stretch and the acceleration on the way back up." "Yeah, but we're definitely gonna have to tweak this in order to get our skydiver to go 122 miles an hour." "Casey." "How are you?" "The man who might be able to help them out is Casey Dale, from bungee. com." "It can be done." "It's..." "There's some math involved as far as getting..." "How fast do you want him to go?" "We're trying to get him up to 122 miles an hour." "So you're going to terminal velocity?" " Exactly." " Yeah." "I mean, Rubber bands are rubber bands." "We can stretch rubber band for you." "We'll need his best and biggest rubber band, which Casey calls a mongo." ""Mongo" means a really big cord, New Zealand-style cord, so that it has more stretch and rapid acceleration." "Think you'll be able to get it up to 122 miles an hour?" "Put enough rubber in, stretch it hard enough, absolutely." "Meantime, Kari struggles to dress her man." "Ohh!" "Then adds some personality." "Hey, there you go." "Now you have a head." "The better to see me with." "Put a parachute on you and drop you out of the sky to your death." "And he should hit a spot that's tailor-made for a smooth landing." "If the guy hits it and ricochets off like this, that's not good for us." "So we're helping it along by squaring off that end a little bit... that's what this is here... as well as really heavily reinforcing it so it can withstand that impact." "With the frame finished and the parts fitting perfectly..." " That's perfect." " Awesome." "...Adam and Jamie rig the high-strength Spectra rope." "Working just like the cables on a crane, this should give us a compression, rather than a bending load." "Well, that's just another seesaw." "That's what it is." "In theory, the rope is even stronger than the spars, but no one knows for sure if this amazing structure can withstand the sudden impact." "And then there's Ariel." "Will she survive?" "Will she even fly?" "The big questions and a dozen little ones will all be answered tomorrow." "All five Mythbusters have joined forces to make or break a bizarre urban legend... the young girl who supposedly survived a seven-story flight from the end of a seesaw." "No surprise then that the test venue is a spectacle in itself..." "Mare Island Naval Shipyard." "Now, the myth states that once the skydiver hit the seesaw, the little girl flew 70 feet up, 7 stories, and landed safely on top of a building." "Now, this works out perfectly for us, this location, because the dry dock is 30 feet deep and that scaffolding right there is 40 feet tall." "So when we place it on the side of the dry dock, that is our seven-story building." "It's our point of reference." "Adam, Tory, and Grant have arrived a day early to make things right for the big test." "So, you might be wondering what these giant plates are." "Well, we can't weld to the dry dock." "We can't drill into it." "We basically can't modify the dry dock in any way." "But we still need something solid to attach our bungee cord to and to attach the seesaw to." "So, our solution..." "trench plates." "Each one of these weighs 7,500 pounds, and we have 2 of them for a total of 15,000 pounds." "I think that ought to be solid enough." "While Tory welds the plates together Adam nervously considers his next step." "I want to make sure that my skydiver hits this seesaw square on." "So I'm gonna run two guide wires that will guide him all the way down to hit the seesaw precisely." "I've got to weld in their bottom points." "Then I got to walk out to the end of the crane and rig the spreader bar." "That should be fun." "It's understood that Adam has a strange idea of fun." "The job itself is simple enough... to secure a sling over the very end of the boom." "Well, that's it." "We're fully rigged up here." "I'm gonna go down below." "Grant goes up to attach the spreader bar to the sling." "Getting this right is probably the most crucial part of the setup." "Okeydoke, I'm gonna let it go." "It looks good." "Down in the dock, Tory welds two sturdy steel tabs to the trench plates." "Adam fastens the wires, then fantasizes about being the fall guy." "So, right now I want you to picture me as an experimental skydiver." "I'm a wet suit filled with dental alginate, and I am being reverse-slingshotted into the ground, using these guide wires to guide me, falling all the way into..." "bang... our seesaw and hopefully sending our little girl flying." "Casey, you made it." "With impeccable timing," "Casey arrives with a bagful of bungee." " Whoa!" " Whoa!" "Look at the size of it!" "Oh, my God." "That's crazy." "So, this is our mongo bungee cord." "It's 23 feet long and five times thicker than a normal bungee cord." "Now, it should be able to stretch up to eight times its own length before it breaks." "But we probably only need it to stretch at three times its own length to get our skydiver falling at 122 miles an hour." "They've done their sums and found that 1,240 pounds of stretch should deliver the speed they need." "But they still have to test it." "So, the first thing that goes on the big hook is this." "It's a dynamometer, and this tells us exactly how much force there is in the system." "The dynamometer gets hooked up to the quick release." "Now all we need is a body." "But they're not prepared to risk Kari's alginate man on a dry run." "So, for our calibration test, we're gonna use this, which is an inner tube filled with sand." "And the idea is that it weighs 171 pounds, which is exactly the same as our human analogue will be." "We have 171 pounds of tire and sand hurling towards the earth at 122 miles an hour." "I am not really sure what is gonna happen, but I know it's gonna be violent." "It will." "They'll be dealing with huge forces from the bungee as they try to propel the weight smoothly down the guide wire for a direct hit at terminal velocity." "You know you have a good myth when you're excited about the calibration tests." "Even in testing, this is the myth that keeps on giving." "All right, we're at 2,240 pounds of force." " We're ready to test this." " Okay." "This is calibration test number one." "Here we go." "3, 2, 1." "Oh, my God!" " Did you see what happened?" " Yeah!" "We just ripped the inner tube!" " Yeah!" " Oh, crazy." "It kind of worked." "I mean, if this had stayed together, it would have been perfect." "Yeah." "The bungee cord worked." "Our guide wires worked." "The inner tube is gonna need a little bit of revision." "Yeah, 'cause this is not an accurate test." "This isn't 171 pounds." "What happened was, the inner tube that we had the sand in ruptured immediately, which shows you the kind of forces that we're using to accelerate the skydiver." "The best possible solution is simple and cheap." "I think what we're gonna do is take a duffel bag, wrap it with ties, and hopefully that will keep the weight together so we can get an accurate test." "So, slight change of plan." "Instead of an inner tube, we're sending our luggage." "Pull on the safety." "If the bag holds together, they'll get a precise fix on the speed of the falling skydiver, and they're hoping that's very close to 122 miles per hour." "Calibration test number two." "In 3, 2, 1!" "Wh-aah!" "I had a feeling that was gonna happen." "Gah!" "It just ripped through the straps." "All right." "We're gonna have to redo it." "So, we just did our second test." "This time the straps on the bag broke." "So the bag didn't even get pulled down." "It just fell down." "Worse still, the bungee cord took a serious hit on the carpet-covered trench plates." " This doesn't look good." " Unh-unh." "Hey, Casey!" "Casey has the spare parts to build one more cord, which they'd all like to save for tomorrow." "Still, they can't proceed without dialing in the speed, so it's well worth a parting shot." "So, right now the bungee is so damaged that we're just gonna take it up and the very second that it hits the right force," "I'm gonna trigger it." "So there's no waiting around, none of this... just go." "21.50, you push the button." "I got it." "Casey helps out on the launch." "And at 21.5, Grant pushes the button." "It goes." "This last calibration test just has to work." " Go!" "Hit it." " Okay." "Here we go!" " Yeah!" " Yeah!" "It worked!" "It hit the target, and the bungee didn't break." "That's perfect." "Now we just got to see what our speed was." "To calculate the speed, they carefully check the high-speed replay frame by frame, and there's reason to be hopeful." "The bungee held, and the bag fell unimpeded." "Grant does the math, and Tory makes the big announcement." "This bungee cord is done." "We can't use it again." "We're gonna have to build a new one when we do the final test." "But the good news is, is we got a calibration for the speed of our falling skydiver, and it's exactly 122 miles an hour." "We are gold." "Grant and Tory, come on down!" "It's the last day of testing the "Seesaw Saga,"" "and Jamie's ready to show off his baby." "3, 2, 1." "Ta-da!" "Wow!" "Oh, my God." "This is better than Christmas." "I've never seen a seesaw like this before." "I was expecting a giant piece of steel." "This is beautiful." "It's elegant." "It's gorgeous." "All the boys are over there going" ""Oh, 85,000 pounds of foot force." "Oh. "" ""It's so cool. "" "It's adorable." "When you think about it, this whole story is just totally absurd." "I mean, a skydiver that just happens to land dead-on on the end of a seesaw." "A girl is on the other side." "She takes off and goes, you know, who knows how many stories in the air." "It's all just, like, nuts." "It's a fantasy." "But it's what we live for, actually on this show." "Kari's Diver Dan makes a rock-star entrance to the dry dock." "That's assuming the rock star is Keith Richards." "And Jamie's found a way to improve the energy transfer by padding the impact zone with foam." "We've got an awful lot of energy coming along with that skydiver." "And if we deliver it all at once like a hammer blow, it's gonna put a lot more stress on the system, on the seesaw." "So what we're doing is slowing that delivery of energy down because it's got to crush this before it gets to the seesaw." "This is kind of like the difference between a sledgehammer and a rubber hammer." "Tory delivers the victim." "You're gonna be fine." "Your dad, Buster's, done it millions of times." "And Grant pulls out the shock watches." "These stick-on patches measure the force of impact." "If the red one triggers, she's dead." "If the green one triggers, she's injured and alive, but she's not walking away." "So they're finally all set to see if a plummeting man, landing perfectly on the end of a seesaw, could really launch a 6-year-old 70 feet high." "There's no question in my mind that there's enough energy in the parachutist as he comes down to throw that little girl way, way up in the air." "And there's a host of problems that we could have." "The dummy could just split apart and only deliver part of his energy." "Things could not line up properly." "The rig could break." "And not to mention she has to go up pretty much straight up in the air for this to work." "Let's spare a thought for the stunt man." "I have a feeling he's gonna do what the average man would do on impact from that height." "He is going to squish into a million little, tiny pieces." "But the myth is all about the welfare of the girl." "Could she really survive a seven-story springboard?" "The best way to find out is to push the button." ""Seesaw Saga," full-size test." "Grant, take it away." "Here we go." "In 3, 2, 1." " Whoo!" " Whoa!" "Yeah!" "Did you expect that?" "It didn't go up." " It shot across the dry dock!" " Wow." "That was cool." "The skydiver hit the seesaw." "The seesaw stayed together." "And the little girl got launched over 55 feet in the air." "That's above the dry dock." "See, the skydiver exploded." "One word for this... splat!" "Looks like he landed butt-first." "His legs missed the seesaw, but his upper torso hit it." "That's probably about 60%, 70% of his mass contacted it, and even that amount was enough to catapult her" "5 stories up in the air and 70 feet laterally." "Grant checks the shock watches, and the news is grim." "Oh!" "Red shock watch is tripped." "Hardly surprising when the doll was flung high and wide into solid concrete." "But this testing needs more finessing." "At this point, it looks like our understanding of the physics is correct." "The only problem that we have is our aim of the skydiver at the target." "Little more than half the weight hit the seesaw, and with Dan's demise, the inner tube gets a recall." "Hopefully it will hold together." "Now, it is the same exact weight as the average man, but this time we're hoping that we'll impart all of its energy onto the seesaw and fling the girl the seven stories that we talked about in the myth." "Here we go!" "In 3, 2, 1!" "Yaah!" "Ow!" " Didn't see that one coming." " Yeah." " Dang it!" " That looked very painful." "She got clotheslined." "We got a good deployment of the sandbag, hit the seesaw, the girl went up, but she got tangled in the wires." "She's traveling on a much greater arc than I saw in any of my scale tests, and I think that's because our seesaw's play is much greater than the playground seesaw." "Well, you can see the red grease going up her shoe." "That's right where she actually hit the guide wire." "So we're gonna have to reset and do this one again." "In the best Mythbusters tradition, the fast-setting winter sun means this next attempt is absolutely our last one." "It's now or never." "Let's go up." "They can only cross their fingers and hope that this time, the girl misses the guide wire." "Here we go!" "3, 2, 1!" " Oh, my God!" " Touchdown!" "Well, Jamie said it would work." "Oh!" "The skydiver simulate did hit 122 miles per hour." "And despite the colossal sideways arc, little Ariel flew way higher than anyone dared to hope." "She flies about level with our spreader bar, and that's 130 feet." "That's 13 stories." "And that was with an angle like this." "If we'd got her to go straight up, she would have cleared 200, easy." "This myth sounded totally improbable from the get-go." "But Jamie and Adam kept the faith." "The fact is, normally when we're testing myths that have to do with broad guesses about physics, they're usually grossly overestimating what's possible, and in this case, we've come across a myth where the physics are grossly underestimated." "If you had an impossibly strong seesaw and if you had a parachutist that didn't just go splat when he hit it, you'd be capable of launching a little girl up at least 13 stories in the air." "So, how do we call it?" "Well, sad to say, it's busted." "Jamie built the best possible seesaw and almost doubled the seven-story flight." "But that little girl would be just as dead as the skydiver." "I've reviewed the high-speed footage, and I've calculated that the little girl was subjected to 42 G's, which means, well, she was likely injured just from her launch from the seesaw." "And her landing..." "That's a whole other thing." "Oh, my God." "That's how far she went?" "Nice work." "We wanted seven stories." "I think she delivered." "High fives." "I think our work here is done."