1 00:00:00,000 --> 00:00:02,520 experts that's right we do this for a living. 2 00:00:30,000 --> 00:00:32,000 and stop a lethal samurai sword 3 00:00:35,400 --> 00:00:37,400 with their bare hands 4 00:00:44,080 --> 00:00:47,260 Who are the myth busters Adam Savage 5 00:00:49,320 --> 00:00:52,240 And Jamie Heineman almost too exciting 6 00:00:53,720 --> 00:00:57,480 Between them more than 30 years of special effects experience 7 00:00:57,840 --> 00:01:01,520 Hugh dramatic music joining them Carrie Byron 8 00:01:03,040 --> 00:01:05,040 Grant imahara 9 00:01:06,120 --> 00:01:11,520 And Tori Bellachy her medics are nowhere to be found they don't just tell the myths 10 00:01:12,360 --> 00:01:14,480 They put them to the test 11 00:01:28,480 --> 00:01:35,840 Well, it looks like you finally got your dream show Adam. It's a whole episode devoted to ninjas 12 00:01:35,840 --> 00:01:37,840 I know it is so cool 13 00:01:37,920 --> 00:01:45,080 You can jump around make cat noises and karate chops and all sorts of adolescent behavior like we know you love to do 14 00:01:45,760 --> 00:01:47,760 I am so psyched about this one 15 00:01:49,760 --> 00:01:55,720 And so you want to go change into your outfit too now what makes you think I have a ninja costume 16 00:01:56,200 --> 00:01:59,760 I don't know something tells me let's look at some stock footage first 17 00:02:03,640 --> 00:02:09,200 The origin of legendary Japanese warriors the ninja is shrouded in mystery 18 00:02:10,920 --> 00:02:18,880 It's believed they were peasants who developed unorthodox combat techniques to defend themselves against the powerful samurai class 19 00:02:19,440 --> 00:02:25,340 Their skills were so extraordinary. They were reputed to border on being supernatural 20 00:02:26,080 --> 00:02:29,000 So what do we got well Jamie son? 21 00:02:29,000 --> 00:02:35,480 We are going to be testing ninjas agility strength reflexes and weaponry by putting their supposed 22 00:02:36,000 --> 00:02:40,320 Mythical skills to the test of modern science. You mean like catching an arrow 23 00:02:41,800 --> 00:02:47,880 Exactly and there's walking on water. What about the build team? They're gonna test whether you can stop a sword 24 00:02:48,400 --> 00:02:50,400 With only your bare hands 25 00:02:51,400 --> 00:02:56,520 Well, maybe we should start by trying to find a real ninja absolutely, let's go 26 00:02:59,760 --> 00:03:07,340 Fortunately modern-day ninjas aren't concerned about being covert and the guys find the bujinkan dojo in San Francisco 27 00:03:07,680 --> 00:03:13,680 Listed in the yellow pages. Okay, so let's play without to start with chief instructor Dale Sego has been teaching 28 00:03:14,040 --> 00:03:17,480 Feudal battle skills here for more than 20 years. I don't 29 00:03:17,920 --> 00:03:19,920 Hi, hey Dale. Good to see you 30 00:03:20,520 --> 00:03:23,200 So this is an injury training going on. Yeah 31 00:03:23,400 --> 00:03:28,840 Well, this is all military close quarters combat stuff from Japan's pre-unification civil war period 32 00:03:28,840 --> 00:03:34,880 So like 1600 80 and before really the stuff that we do is based on timing positioning tactics and psychology 33 00:03:35,240 --> 00:03:40,400 Rather than speed and power. I was hoping you just show us like, you know, what an injured would do if I tried to attack 34 00:03:41,240 --> 00:03:44,640 Okay, is now the time to tell Adam Dale is 35 00:03:44,840 --> 00:03:47,580 15th Dan and there is no 16 36 00:03:48,200 --> 00:03:53,440 Hopefully Adam won't get hurt too bad. A little bit is good. Just do whatever 37 00:04:00,880 --> 00:04:06,040 Adam hits the mat in record time. I was to do it so that I locked him up 38 00:04:07,560 --> 00:04:14,320 As he falls Dale gives Adam some pointers on the way down with the famed ninja throwing star 39 00:04:14,320 --> 00:04:16,200 I wasn't actually using the point just this but it would 40 00:04:17,200 --> 00:04:22,040 Ripping out here. Yeah, we took him down. I had it in here to right in the back. That's good 41 00:04:22,040 --> 00:04:22,720 We fell down 42 00:04:22,720 --> 00:04:27,720 I was ripping across here and he came down at a point where he actually was landing on it like this on the back of his neck 43 00:04:28,480 --> 00:04:30,200 That's pretty efficient 44 00:04:30,200 --> 00:04:34,080 Will you come back to our shop and do some of this on high-speed camera? Yeah, I'd like to awesome 45 00:04:34,960 --> 00:04:36,760 Okay, I'm done 46 00:04:36,760 --> 00:04:43,320 It's back to the layer to test their three ninja myths beginning with the tale of running on water 47 00:04:45,040 --> 00:04:46,520 Well barring any 48 00:04:46,520 --> 00:04:51,520 Magical powers which we can't really test on this show ninjas definitely didn't just walk on water 49 00:04:51,880 --> 00:04:56,400 But they might have had some help our researchers have turned up a thing called miss a goomo 50 00:04:56,440 --> 00:04:59,440 So I'm gonna build a set of these and see how effective they are 51 00:05:00,040 --> 00:05:06,800 Miss a goomo meaning water spider in Japanese were flat wooden disks that ninjas strapped to their feet 52 00:05:06,800 --> 00:05:13,400 The theory is the wide surface area distributed their weight evenly on the surface of the water so they didn't sink 53 00:05:14,600 --> 00:05:16,000 So 54 00:05:16,000 --> 00:05:19,080 What kind of wood would a ninja cobbler have used? 55 00:05:19,400 --> 00:05:25,040 I've got some pine based light density fiberboard here. It's pretty much perfect for our uses 56 00:05:25,040 --> 00:05:28,040 So I'm gonna use this as our stand-in for the miss a goomo wood 57 00:05:28,840 --> 00:05:31,960 Adam measures and cuts out two circles of pine board 58 00:05:33,120 --> 00:05:36,520 Then he slices each of them into four separate pieces 59 00:05:38,480 --> 00:05:40,160 That's good 60 00:05:40,160 --> 00:05:46,320 One by one he stains the sections with a brown pigment and painstakingly sands them back 61 00:05:47,560 --> 00:05:49,560 paint on 62 00:05:49,560 --> 00:05:51,360 paint off 63 00:05:51,360 --> 00:05:55,080 Such is the mysterious way of the former movie prop maker 64 00:05:55,280 --> 00:06:01,080 Who for no particular reason wants his water shoes to look worn in looks a bit like old wood now? 65 00:06:02,720 --> 00:06:08,800 Lastly he places a rectangular block in the middle of each circle and secures the pieces together using twine 66 00:06:10,160 --> 00:06:16,960 It's an ancient jigsaw that makes for a puzzling pair of footwear. I didn't expect it to fold like that 67 00:06:17,960 --> 00:06:19,960 But I wonder if that's not 68 00:06:21,160 --> 00:06:23,160 Actually part of its function 69 00:06:23,240 --> 00:06:29,640 Jimmy Choo can rest easy, but these replica ninja shoes may just float like boats 70 00:06:29,640 --> 00:06:31,640 Hey, wait to see how these work 71 00:06:40,160 --> 00:06:45,440 All right, we know ninjas have speed and quick reaction time this myth is about strength 72 00:06:45,920 --> 00:06:49,280 Ideas and ninjas being attacked by a swordsman swordsmen's coming to swing at his head 73 00:06:49,280 --> 00:06:54,680 Ninja catches the blade in his hands without cutting his hands and without being chopped in half me like this 74 00:07:00,440 --> 00:07:04,440 You're not supposed to like that's precisely why we're not starting with real swords 75 00:07:05,200 --> 00:07:12,680 Precisely the team learned just how dangerous real swords can be in a previous myth when they built a 76 00:07:13,360 --> 00:07:15,360 Decapitation hazard everybody 77 00:07:15,520 --> 00:07:21,320 pneumatically powered mechanical device that could whip around with the same force and precision 78 00:07:21,880 --> 00:07:25,680 Not good as a samurai with a point to prove 79 00:07:26,680 --> 00:07:29,280 Well, I guess it's time to dust off the old sword swing rig 80 00:07:29,280 --> 00:07:34,200 I think we're gonna have to turn on the side because I think it's more like a head swing and maybe calibrate it to human speed 81 00:07:34,200 --> 00:07:38,680 All right, cool. So which one of us is gonna catch it not me people say I'm not that quick 82 00:07:40,360 --> 00:07:43,260 All right, well, maybe we should make a sword catching rig 83 00:07:43,260 --> 00:07:47,080 Maybe two hands that come together like that and we'll calibrate it to human force 84 00:07:47,640 --> 00:07:50,000 Sweet sweet. There's gonna be so much fun 85 00:07:51,640 --> 00:07:54,800 First they need to make fake hands to attach to their rig 86 00:07:56,080 --> 00:08:00,480 Carrie gets to work and mixes up a batch of alginate to make molds 87 00:08:04,200 --> 00:08:07,880 No, I got something else going on. I got surprised for you guys. You're gonna love it 88 00:08:09,440 --> 00:08:14,760 After 20 minutes the gel is set go higher and Tori can break free 89 00:08:15,280 --> 00:08:17,280 Nice looks good 90 00:08:19,280 --> 00:08:27,120 Meanwhile grants brought our ninja's nemesis the samurai sword swinging rig out of storage and has started putting it back together 91 00:08:27,520 --> 00:08:35,840 The basic idea behind this is big air ram pulls on the chain the chain is wound around the shaft as it pulls 92 00:08:36,600 --> 00:08:38,600 spins the shaft sword swings 93 00:08:39,760 --> 00:08:41,760 really quickly 94 00:08:41,960 --> 00:08:47,840 Representing our aristocratic samurai warrior is a pricey reproduction Japanese sword 95 00:08:48,840 --> 00:08:54,740 Representing our ninja peasant is a humble ballistics gel head like it. I love it. Good humble 96 00:08:55,060 --> 00:08:59,300 They align the blade so it sweeps in a downward motion between the arms 97 00:08:59,540 --> 00:09:02,900 Here's the hands. Yep. Yes, it'll get caught right here 98 00:09:03,420 --> 00:09:05,580 In the skull. Love it. That's great 99 00:09:06,140 --> 00:09:12,780 Carrie has made multiple ballistics wax reproductions from Tori's hand molds and slots her first set into the ring 100 00:09:13,780 --> 00:09:18,860 Now we can also get that applause. We always wanted hmm mythbusters with a live audience 101 00:09:25,340 --> 00:09:28,700 Coming up the team tries to cut it as ninjas 102 00:09:30,540 --> 00:09:33,420 We test to see whether ninja miss a gumo shoes 103 00:09:42,180 --> 00:09:47,860 The belief that some people possess the ability to walk on water has been around for centuries 104 00:09:49,420 --> 00:09:51,820 So why not the mythical ninja? 105 00:09:52,060 --> 00:09:54,060 I 106 00:09:54,380 --> 00:10:00,540 Don't know Jamie arrived at the bamboo reef dive center to try out their replica feudal foot floaties 107 00:10:01,060 --> 00:10:07,180 Reaser pool for water shoes you bet. All right. Go for it. Cool. Thanks Adam vanishes 108 00:10:08,060 --> 00:10:10,060 into the ladies room 109 00:10:11,140 --> 00:10:13,140 And just like magic 110 00:10:13,140 --> 00:10:23,740 These are my special device for stirring the castle walking across the water 111 00:10:25,260 --> 00:10:27,060 All right then 112 00:10:27,060 --> 00:10:31,180 They may look unfathomable time might feed in within an inch of their lives 113 00:10:31,260 --> 00:10:37,540 But these flat wooden discs were modeled on an exact replica of Japanese feudal times footwear 114 00:10:38,220 --> 00:10:44,160 When we started looking into whether ninjas could walk on water the first piece we came up with is a museum piece called a 115 00:10:44,740 --> 00:10:48,540 Mizogumo supposedly for water walking. I'm about to find out 116 00:10:49,060 --> 00:10:54,180 Being pre velcro Jamie's nautical knot tying skills are a big help 117 00:10:54,740 --> 00:11:00,340 How many people know this but Jamie comes from an ancient line of nine generations of shoe tires 118 00:11:00,540 --> 00:11:02,540 I 119 00:11:02,820 --> 00:11:07,560 Come silent walrus. Let us storm the castle. I will don my safety key 120 00:11:08,260 --> 00:11:10,260 Don's his padded suit 121 00:11:11,180 --> 00:11:13,180 Sikes himself up for the challenge 122 00:11:14,180 --> 00:11:17,820 The pool waters are as still as glass and all is quiet 123 00:11:18,180 --> 00:11:23,740 It is time for ninja savage to stride forward and walk across its surface 124 00:11:31,340 --> 00:11:33,860 The first step seemed kind of promising 125 00:11:35,700 --> 00:11:42,180 Promising maybe a stretch in order for it to be called walking on water there needs to be more than one step 126 00:11:43,900 --> 00:11:48,060 But ninjas are no quitters so Adam has another tactic to try 127 00:11:49,300 --> 00:11:54,980 To me it seems like it's all gonna be a function of my ability to move my feet crazy fast like a like a cartoon 128 00:11:56,300 --> 00:11:58,300 Which might be possible 129 00:12:00,540 --> 00:12:02,540 Yeah 130 00:12:04,060 --> 00:12:11,180 Despite his increased momentum the shoes still weren't able to support Adam's weight, but it was comical 131 00:12:11,180 --> 00:12:14,700 I believe that the moment I hit the water. I was sinking in the water 132 00:12:17,020 --> 00:12:19,300 These may have slowed my scent 133 00:12:20,540 --> 00:12:26,740 Really the best it can be said for them looks like Adam's ninja turtle aspirations are all washed up 134 00:12:27,620 --> 00:12:33,300 I don't know about you, but do you seem a little cumbersome to me? Yeah, I don't think you're going anywhere on water with those things 135 00:12:33,460 --> 00:12:35,900 The important thing is that I look damn good 136 00:12:38,980 --> 00:12:43,540 Well, it turns out that meets the gumus were never really intended for walking on water 137 00:12:43,540 --> 00:12:49,260 They were more for like rice patties or mud flats and they probably worked okay kind of like snow shoes 138 00:12:49,860 --> 00:12:56,660 Exactly, however, you know ninjas also were not at all above trying to encourage the belief in their supernatural power 139 00:12:57,100 --> 00:12:58,860 Right the masters of misinformation 140 00:12:58,860 --> 00:13:06,060 I've heard they would do things like place posts underneath the water as they were escaping a showgun castle to make it look like they were walking on water 141 00:13:06,060 --> 00:13:09,780 They wanted people to fear their magical powers exactly 142 00:13:11,620 --> 00:13:17,540 Misugumo shoes may have sunk like the Titanic, but the guys might just rescue this myth yet 143 00:13:18,420 --> 00:13:28,180 Could ninja stop speeding swords with their bare hands 144 00:13:32,180 --> 00:13:39,860 To find out the team is building a mechanical device that's part sword swinging samurai and part sword catching ninja 145 00:13:40,100 --> 00:13:48,140 To calibrate it to move with realistic human strength and speed they need to do some tests 146 00:13:48,780 --> 00:13:54,140 Grant hangs a force plate on a C-stand that represents the blade the ninja must catch 147 00:13:55,100 --> 00:14:02,060 The force of the ninja's hands will be set to the person with the greatest strength and do it like your life depends on it 148 00:14:02,620 --> 00:14:04,620 Thanks for that motivation grand 149 00:14:07,660 --> 00:14:09,660 Go 150 00:14:10,820 --> 00:14:15,380 And with a mighty firm smack peaking at 1,000 newtons 151 00:14:15,780 --> 00:14:23,060 The most determined to stay in one piece is the pain grant the pain from the initial hit 152 00:14:23,660 --> 00:14:25,660 There you go 153 00:14:25,780 --> 00:14:27,780 You're all full of newtons 154 00:14:29,180 --> 00:14:33,820 Yeah, big newtons, baby the team sets up for their next test 155 00:14:34,980 --> 00:14:37,380 To determine the speed of the sword swipe 156 00:14:38,380 --> 00:14:46,380 Take this sword throw it down as hard as you can on the ninja and we'll see who's the fastest don't think of it as a competition 157 00:14:47,780 --> 00:14:49,780 But it is 158 00:14:50,780 --> 00:14:55,260 Suddenly Adam ambushes the trio it was a classic ninja move 159 00:14:56,740 --> 00:14:59,020 Tori steps up to take the first swing 160 00:15:08,380 --> 00:15:12,860 Warning sword blows to the cranium may cause headaches 161 00:15:14,420 --> 00:15:17,300 Next will Adams attempt have more of an edge 162 00:15:18,580 --> 00:15:21,260 Master savage sword swinging trial take one 163 00:15:30,740 --> 00:15:34,260 Ninja's cool black stalker wear is getting shredded 164 00:15:34,500 --> 00:15:42,580 Finally it's grand's turn the ninja must go to the bathroom before he swings his sword 165 00:15:43,340 --> 00:15:47,140 He hasn't looked this in sense since Star Trek was canceled 166 00:15:48,180 --> 00:15:50,780 Mastery Mahara sword swinging test take one 167 00:15:53,060 --> 00:15:55,060 Nice 168 00:15:56,700 --> 00:16:02,020 They compare their times on my high speed and once again grant aces the test 169 00:16:02,900 --> 00:16:10,300 How many frames is that that is 24 frames and 96 milliseconds nice word way to go benchmark 170 00:16:10,300 --> 00:16:15,780 Thank you. I think it was the face. That's about 40 is like 47 miles per hour 171 00:16:17,900 --> 00:16:22,100 Coming up the team discover a ninja job safety hazard 172 00:16:23,820 --> 00:16:29,500 Look how deep that went and could a ninja really pluck an arrow out of the air 173 00:16:30,180 --> 00:16:32,180 Sorry about that man. It's okay 174 00:16:43,940 --> 00:16:45,940 Next up in our ninja bits 175 00:16:45,980 --> 00:16:48,180 Can you catch an arrow with your bare hands? 176 00:16:48,820 --> 00:16:50,220 How are we gonna do that? 177 00:16:50,220 --> 00:16:55,980 Well, I figure we should take some of our arrows downstairs and you can shoot them at me and I'll just try and catch them 178 00:16:56,380 --> 00:16:59,300 So you'd actually let me shoot at you with a bow and arrow 179 00:17:00,700 --> 00:17:02,540 Amazingly, yes 180 00:17:02,540 --> 00:17:04,540 All right 181 00:17:04,780 --> 00:17:08,620 Legend has it that a ninja could do this dexterous trick with ease 182 00:17:08,900 --> 00:17:11,900 So Jamie and Adam want to get a feel for it themselves 183 00:17:11,900 --> 00:17:16,740 I'm gonna string a regular bow and set up an arrow with a tennis ball 184 00:17:16,740 --> 00:17:18,100 I know and 185 00:17:18,100 --> 00:17:24,540 Shoot it at Adam or at least off to the side of Adam. We'll put Adam in a protective suit in case I 186 00:17:24,860 --> 00:17:26,860 Either get frisky or miss 187 00:17:27,740 --> 00:17:32,420 Jamie is an experienced archer and even though he's not using a real arrowhead 188 00:17:32,420 --> 00:17:37,860 This is not something to try at home. He's gonna be shooting from over there into this garbage can 189 00:17:37,860 --> 00:17:42,860 I'm gonna be standing here. We'll catch it on high-speed camera. See how fast I can actually catch the arrow at 190 00:17:43,780 --> 00:17:49,340 Jamie marks out notches on the shaft the further he pulls back the faster the rod will travel 191 00:17:51,180 --> 00:17:53,020 Push 192 00:17:53,100 --> 00:17:58,740 All right, I'm ready if you are you want to start slow. Yep. All right, Jamie starts out at mark one 193 00:18:02,820 --> 00:18:09,220 The arrow eludes Adam's grasp I don't have enough time to anticipate like by the time you let go and I'm moved 194 00:18:09,900 --> 00:18:14,300 Still at mark one this time Adam tries to move in sync with the arrow 195 00:18:16,660 --> 00:18:17,900 Hey 196 00:18:17,900 --> 00:18:19,900 Good job, you know, I 197 00:18:20,580 --> 00:18:25,140 Anticipated when you were just about to do it and I just started moving and we worked. It's like working together 198 00:18:25,780 --> 00:18:30,280 It's a beautiful thing. Next Jamie ups the addy to mark three 199 00:18:34,180 --> 00:18:40,580 But the arrow keeps sailing on by as the guys unified martial arts magic peaked already 200 00:18:40,820 --> 00:18:47,980 Even though Adams form was impressive the speed was lacking 201 00:18:48,020 --> 00:18:54,500 Their tennis ball projectile was traveling at 58 miles an hour a third of the speed of a real arrow 202 00:18:55,460 --> 00:18:58,740 You've got a couple of things here that are throwing this off for one thing 203 00:18:58,740 --> 00:19:04,060 This is what twice or three times as heavy as a normal arrow would be because of that thing on the end of it 204 00:19:04,060 --> 00:19:07,300 Right, I really think that we need to figure out some other solution 205 00:19:08,060 --> 00:19:13,740 To test this myth at a true-to-life rate the guys have to bounce around a new strategy 206 00:19:17,620 --> 00:19:22,380 Back over at M7 the team has finished putting their mechanical sword catching rig together 207 00:19:23,020 --> 00:19:26,060 Now to set it to move at a real-life rate 208 00:19:27,060 --> 00:19:31,220 We don't want it to be superhuman and we don't want it to be subhuman 209 00:19:31,580 --> 00:19:36,500 We want it to be whatever a person could do then we'll be ready to try and 210 00:19:37,340 --> 00:19:39,340 Catch a sword 211 00:19:40,780 --> 00:19:45,460 Calibration first test at OPSI in three two one 212 00:19:48,900 --> 00:19:53,900 The speed and force of the ninja's arms was exactly the same as Grant's best time 213 00:19:54,020 --> 00:19:58,020 But the replay reveals something undetectable to the naked eye 214 00:19:58,020 --> 00:20:01,620 There's a bounce back which could let that sword get right through there 215 00:20:02,020 --> 00:20:06,700 As the hands hit together they bounce off each other and jiggle like Jello 216 00:20:07,140 --> 00:20:09,620 Opening up an unforeseen headache 217 00:20:09,980 --> 00:20:13,460 The force is causing him to bounce away and it's allowing a gap 218 00:20:13,460 --> 00:20:17,740 Which is gonna allow the sword to go right through and bury into the guy's head 219 00:20:18,260 --> 00:20:22,420 What I'm thinking is maybe we do is put some kind of a latch so that when the hands come together 220 00:20:22,580 --> 00:20:25,460 It keeps them there and it's not adding any more pressure 221 00:20:25,460 --> 00:20:30,060 All it's doing is keeping the hands together like you would be able to do if you were using your muscles 222 00:20:30,780 --> 00:20:37,560 He attaches two kickstands to the arms that will fall and lock into ratchets and fastens pneumatic rams 223 00:20:37,860 --> 00:20:41,140 On either side of the hands as things starting to look like a monster 224 00:20:41,780 --> 00:20:47,980 Pretty soon you're not gonna recognize it, but it's function not form that counts. Here we go in three 225 00:20:48,980 --> 00:20:50,220 two 226 00:20:50,220 --> 00:20:52,220 one 227 00:20:52,220 --> 00:20:57,100 That look nice and sturdy and stable. Yeah, they check it out frame by frame 228 00:20:58,100 --> 00:21:00,100 Stay together 229 00:21:11,660 --> 00:21:18,380 With their rigs set to human speed and pressure Grant adds a final touch that will trigger the entire system 230 00:21:20,020 --> 00:21:23,500 When the arm passes through it actually activates 231 00:21:24,340 --> 00:21:30,980 The hands clapping let the recreation of the battle between the two ancient warrior classes begin 232 00:21:33,820 --> 00:21:36,260 In three two one 233 00:21:42,660 --> 00:21:49,580 High five it seems our mechanical ninja thwarted the flash of samurai slicing steel straight away 234 00:21:49,820 --> 00:21:52,060 Or are we jumping to conclusions? 235 00:21:53,620 --> 00:21:54,620 Why? 236 00:21:54,620 --> 00:21:57,860 It bounced off the table and then shot back up into the 237 00:21:59,060 --> 00:22:01,060 So you got it on the rebound 238 00:22:01,140 --> 00:22:05,300 And everybody knows being caught on the rebound doesn't count 239 00:22:07,860 --> 00:22:11,420 That was like shock that we actually caught it. It was like how does it that easy? 240 00:22:12,540 --> 00:22:13,580 So true 241 00:22:13,580 --> 00:22:19,380 But moving on is the best remedy Grant adjusts the timer so the hands will trigger sooner 242 00:22:19,380 --> 00:22:26,300 Hopefully this time the adjustment will get it so that the hands clap right on the sword. All right, three two 243 00:22:26,780 --> 00:22:28,780 one 244 00:22:29,420 --> 00:22:31,420 He stopped it with his head 245 00:22:35,900 --> 00:22:39,500 Look how deep that went it's all the way down to his eyebrow 246 00:22:40,020 --> 00:22:46,620 Whoa that definitely split your skull the hand slam shot quicker, but not quick enough 247 00:22:49,940 --> 00:22:51,940 Okay 248 00:22:55,980 --> 00:23:02,980 So they tweak the timer just a hair ninja sword catching rig in three two one 249 00:23:08,660 --> 00:23:10,660 They look right it look really good 250 00:23:11,140 --> 00:23:13,380 This time the sword comes to a stop 251 00:23:13,500 --> 00:23:19,860 But only because the hands closed a fraction too early and the blade got stuck in the ballistics material 252 00:23:20,460 --> 00:23:23,060 five milliseconds off all right five 253 00:23:23,900 --> 00:23:29,620 milliseconds jump fast five milliseconds is that's ridiculous faster than you can blink your eye 254 00:23:30,220 --> 00:23:32,220 much faster 255 00:23:33,020 --> 00:23:39,500 Such an infinite tesama amount might not make any difference to their results in the slice palm 256 00:23:40,140 --> 00:23:46,220 So do they call this myth busted right here right now or go for absolute precision? 257 00:23:46,220 --> 00:23:47,380 I 258 00:23:47,380 --> 00:23:54,140 Think maybe we have to get it the perfect timing before we can actually say anything other people yell at us next Adam and Janie 259 00:23:54,500 --> 00:23:56,500 Reinvent the ancient ninja 260 00:23:56,900 --> 00:23:58,900 21st century style 261 00:24:01,060 --> 00:24:08,540 And after the show log on to discovery comm slash myth busters to see what ask a ninja ninja thinks about the show 262 00:24:09,900 --> 00:24:14,100 We do a lot of crazy stunts in this show, but none of it is stuff you should try at home 263 00:24:19,020 --> 00:24:24,540 Jamie and Adam are targeting the myth that a ninja can fuck a speeding arrow out of the air 264 00:24:26,020 --> 00:24:30,260 You know I was only able to catch these arrows at 60 miles an hour, and I'm not trained at this 265 00:24:30,260 --> 00:24:37,420 But still your average arrow travels like three times that fast if we were to build a mechanical hand 266 00:24:37,460 --> 00:24:40,500 I could do that, you know I can make it grab as fast as it's 267 00:24:40,980 --> 00:24:46,500 Physically possible to grab something or even faster if it turns out that's not possible. Yeah, okay 268 00:24:46,500 --> 00:24:52,460 I'll build a super accurate arrow shooting rate you build a hand grabbing ring and we'll see what the limit of the human ability to 269 00:24:52,460 --> 00:24:54,460 Grab an arrow is okay 270 00:24:55,940 --> 00:25:02,220 Before they build a new rig Jamie and Adam want to study the physical capability of a master of martial arts 271 00:25:03,140 --> 00:25:05,140 up close 272 00:25:05,300 --> 00:25:07,300 And personal 273 00:25:08,420 --> 00:25:12,880 And to the day our feudal battle skills expert. Sorry sir 274 00:25:12,880 --> 00:25:19,620 Hi, I'm gonna see Dale is willing to let the guys time the swiftness of his highly trained hand when you're ready 275 00:25:20,140 --> 00:25:23,360 Just go like that and we'll fire the camera and see how fast 276 00:25:24,860 --> 00:25:27,400 There whenever you're ready 277 00:25:28,780 --> 00:25:30,780 To get it 278 00:25:31,100 --> 00:25:33,100 If you blink you would have missed it 279 00:25:33,420 --> 00:25:40,340 Wow, this is 500 frames per second, so you closed your hand in about 35 milliseconds 280 00:25:40,620 --> 00:25:41,380 That's great 281 00:25:41,380 --> 00:25:47,220 That gives us a really good baseline to try and get a robot to equate to and I think it makes a lot easier for our mythical 282 00:25:47,220 --> 00:25:51,180 Ninja to actually catch it Jamie's beret doesn't come off for many reasons 283 00:25:51,180 --> 00:25:57,100 But one of them is to well his job is to make a mechanical hand. That's as fast as Dale's 284 00:25:57,940 --> 00:26:04,740 This is a trick that I've used before on various kinds of movie things where I need a fake hand 285 00:26:05,300 --> 00:26:12,580 Motorcycle chain is actually a very sturdy and if you run up a line along one side of it that pulls taught the whole thing 286 00:26:12,700 --> 00:26:18,620 Wants to curl up like that. Jamie welds five pieces of chain together to form the fingers of a hand 287 00:26:19,780 --> 00:26:25,020 Then he attaches it to a metal stand and threads the links through with long laces 288 00:26:25,580 --> 00:26:28,700 These things that I'm putting in here right now would be equivalent to 289 00:26:29,340 --> 00:26:30,460 tendons 290 00:26:30,460 --> 00:26:33,860 But instead of going to a muscle they're going to a pneumatic actuator 291 00:26:34,380 --> 00:26:40,220 The actuators will provide the force that will clamp the fingers and thumbs shot in a vice-like grip 292 00:26:41,780 --> 00:26:44,220 This will be protecting Jamie's shop in no time 293 00:26:46,020 --> 00:26:48,020 You have three minutes to comply 294 00:26:49,820 --> 00:26:53,580 While Jamie completes the catch Adam works on the throw 295 00:26:55,020 --> 00:27:00,380 Hard-mounted the bow to a steel frame. I've got a trigger mount that can pull back the string 296 00:27:00,380 --> 00:27:06,040 And all this will be attached to a timer a super sensitive timer that will also trigger the hand catching 297 00:27:06,660 --> 00:27:12,220 The timers will allow the guys to fine-tune the release and hand grab to the millisecond 298 00:27:14,060 --> 00:27:20,820 Adam and Jamie's arrow-napping device is part man. Haha, that's perfect part machine 299 00:27:20,820 --> 00:27:22,820 Well 300 00:27:26,100 --> 00:27:31,940 Hey moving that's not going anywhere. Oh ninja robo hands 301 00:27:33,860 --> 00:27:35,860 Your move creep 302 00:27:38,340 --> 00:27:44,360 Arrow catching rig test number one here we go three two one 303 00:27:50,900 --> 00:27:52,900 Too late 304 00:27:52,940 --> 00:27:56,340 Adam goes through the numbers off by 200 milliseconds 305 00:27:56,740 --> 00:28:02,020 Both the arrow and hand were moving at accurate real-life speeds the arrow clock 306 00:28:02,500 --> 00:28:08,940 170 miles an hour and the hand grab was just two milliseconds slower than ninja Dale 307 00:28:10,100 --> 00:28:13,300 Adam adjusts the timers to his precise calculations 308 00:28:13,940 --> 00:28:20,000 The arrow to release 200 milliseconds after the hand starts to activate. So that's one two 309 00:28:20,320 --> 00:28:24,940 It's 200 milliseconds that ought to do it three two one 310 00:28:26,840 --> 00:28:29,200 Wonder what happened too fast for my eyes. I know 311 00:28:30,960 --> 00:28:33,880 Finally they achieve a perfectly coordinated shot 312 00:28:34,000 --> 00:28:41,800 But even though the rig was working at the correct human and arrow speed the ever elusive projectiles slips through the hand's grasp 313 00:28:43,520 --> 00:28:47,880 That tells me that at human speed it's not fast enough to grab the arrow 314 00:28:48,120 --> 00:28:50,840 I think that's exactly what this says. I think you're absolutely right 315 00:28:51,240 --> 00:28:54,200 I think our only choice at this point is to make the hand go faster 316 00:28:54,840 --> 00:28:59,880 To ramp it up. That's all there is left. All right. I'll get to rig it. Hi 行きましょ 317 00:29:00,440 --> 00:29:06,200 That's let's go in Japanese. We have a technique for speeding up the hand. So this will move 318 00:29:06,840 --> 00:29:08,840 So quickly you won't even be able to see it move 319 00:29:09,560 --> 00:29:17,080 Very ninja the trick is to spring load the actuators so they hit the quick release superhuman hard and fast 320 00:29:17,960 --> 00:29:19,000 three 321 00:29:19,000 --> 00:29:19,960 two 322 00:29:19,960 --> 00:29:21,960 one 323 00:29:25,720 --> 00:29:27,720 That is perfect 324 00:29:29,800 --> 00:29:31,800 Superhuman ninja strength 325 00:29:33,480 --> 00:29:38,680 Got it at bionic speed robo hand finally manages to defend himself 326 00:29:39,720 --> 00:29:45,800 Our robot hand is closing five times as fast as a human could possibly close their hand and that's what it took 327 00:29:45,800 --> 00:29:51,240 It finished before the tail feathers got there, but any slower it wouldn't have caught that arrow 328 00:29:51,880 --> 00:29:55,960 So the hand of a mere mortel could never have achieved this feat 329 00:29:56,760 --> 00:30:01,720 Myth is busted. This is what it would take to catch an arrow robo hand robo hand 330 00:30:02,280 --> 00:30:07,240 Now just all we have to do is build the rest of our superhuman ninja robot and we can take over the world 331 00:30:08,600 --> 00:30:10,600 Okay, you do that 332 00:30:16,440 --> 00:30:21,240 On the other side of the break adam has trouble finding his feet walking on water 333 00:30:23,640 --> 00:30:26,760 Woo, I'll find an indignity that would have been humiliating 334 00:30:34,280 --> 00:30:36,280 Trying to walk on water 335 00:30:37,080 --> 00:30:41,480 Wearing an exact replica of supposed ninja water walking shoes 336 00:30:43,160 --> 00:30:45,160 Adam got nothing but wet 337 00:30:45,960 --> 00:30:53,000 This time adam is thinking out of the box and making a modern day pair of ninja shoes 338 00:30:55,000 --> 00:31:01,960 His 21st century misugumo materials are a pair of snowboard boots aluminum and packing foam 339 00:31:03,000 --> 00:31:05,000 This is a deadly weapon 340 00:31:08,040 --> 00:31:13,800 I've calculated that four layers of this gives me about 2.2 cubic feet per foot 341 00:31:14,520 --> 00:31:19,640 Of water displacement that equals about a total of 265 pounds of buoyancy 342 00:31:20,200 --> 00:31:23,880 He traces outlines of the boots onto the foam cuts out a hole 343 00:31:26,360 --> 00:31:28,360 And wedges them inside 344 00:31:30,840 --> 00:31:33,240 Then he sprays glue between the layers 345 00:31:36,280 --> 00:31:38,920 Awesome, I could not have gone better 346 00:31:39,880 --> 00:31:45,720 He tapes aluminum sheeting to the base and rivets on a lightweight rail to keep everything rigid 347 00:31:46,040 --> 00:31:50,520 The final touch is to paint them in a timeless shade of ninja noir 348 00:31:51,400 --> 00:31:55,960 I'm painting these black because I want to say that I want to be invisible, right? 349 00:31:56,040 --> 00:31:59,400 I mean it's like in the modern society. You're just 350 00:32:00,200 --> 00:32:02,200 Now one knows who you are 351 00:32:02,200 --> 00:32:05,160 That is the essence of the ninja, right? 352 00:32:05,160 --> 00:32:14,360 To find out it's back to the pool these look like fun. Well, this is ninja suit 2.0. This is my attempt 353 00:32:14,920 --> 00:32:16,280 What do you think? 354 00:32:16,280 --> 00:32:20,520 I think it's going to be real hard to stay upright on those puppies. There's only one way to find out 355 00:32:24,360 --> 00:32:29,080 Yeah adam boards his tanker ships and is ready to launch 356 00:32:35,160 --> 00:32:37,160 Ha ha ha ha ha ha 357 00:32:38,600 --> 00:32:42,280 Whoo, if I had any dignity that would have been humiliating 358 00:32:43,240 --> 00:32:46,360 Just as well because we want to see that pratfall again 359 00:32:48,520 --> 00:32:56,600 For his next attempt he tries a gentle sitting start. There you go. There we go. Oh, I'm stealthy as the night 360 00:32:57,640 --> 00:32:59,640 Oh 361 00:32:59,880 --> 00:33:01,880 Don't I look like silent death? 362 00:33:02,600 --> 00:33:06,200 I'm bringing justice in the night 363 00:33:11,800 --> 00:33:16,200 Our far from soundless assassin is trying his hardest to move forward 364 00:33:18,040 --> 00:33:23,000 My paddle still seems to be working man, but it's like being stuck on a nautical treadmill 365 00:33:23,880 --> 00:33:25,880 I 366 00:33:30,200 --> 00:33:35,640 Don't know about these ninja shoes man. What do you think? I think they suck. They don't suck 367 00:33:37,000 --> 00:33:39,000 Harsh but true 368 00:33:41,080 --> 00:33:47,320 The samurai have won this mission and adam accepts defeat I give up on my ninja shoes 369 00:33:48,280 --> 00:33:49,960 They're not stealthy 370 00:33:49,960 --> 00:33:51,640 They're not easy 371 00:33:51,640 --> 00:33:53,640 And they don't move 372 00:33:54,280 --> 00:34:00,920 Coming up on mythbusters. Can I walk across this tub of goo and kari takes a swing at a real ninja? 373 00:34:09,240 --> 00:34:15,720 You've seen this ninja battle trick in a thousand b-grade martial arts movies, but is it possible? 374 00:34:15,720 --> 00:34:24,280 To find out kari tori and grant built a sword catching machine that so far hasn't cut it 375 00:34:25,080 --> 00:34:27,080 He stopped it with his head 376 00:34:27,080 --> 00:34:33,720 But the timing of their rig is only off by less than the blink of an eye and grants got a plan to make it perfect 377 00:34:35,160 --> 00:34:42,200 And that's this it's a timer and this will give me millisecond resolution so I can dial in the delay exactly 378 00:34:43,160 --> 00:34:48,760 Grant makes the minute adjustment they need and our ninja is prepared to make his final attempt 379 00:34:49,560 --> 00:34:54,360 This is it. I can feel it. This has got to be in three two one 380 00:34:56,280 --> 00:35:00,120 Ah something came off the hands. Yeah, it was really close 381 00:35:02,440 --> 00:35:08,440 Once again the sword slips through our ninja's fingers, but where his reflexes right on 382 00:35:09,240 --> 00:35:11,800 That's that's that's it. Keep going 383 00:35:13,720 --> 00:35:15,720 Keep going keep going keep going 384 00:35:16,440 --> 00:35:20,760 We got it. That's the timing was right. Thank you. Thank you very much 385 00:35:20,920 --> 00:35:25,800 You can't get any more perfect on the timing than that. You still can't catch the sword. That's it. Look and it's just 386 00:35:27,080 --> 00:35:31,880 Slide right through with their mechanical ninja operating under ideal conditions 387 00:35:32,200 --> 00:35:34,440 There's nothing more they can do in the workshop 388 00:35:34,680 --> 00:35:39,880 So it's time again to consult our real life ninja dale nice to meet you 389 00:35:40,360 --> 00:35:44,360 So I notice you have all your fingers. Have you ever tried to catch a sword with your hands? 390 00:35:44,520 --> 00:35:47,320 We prefer to get out of the way. I mean we may take the sword away 391 00:35:48,040 --> 00:35:51,880 But there's there's an offline evasion first a wise tactic 392 00:35:52,200 --> 00:35:58,200 But to put this myth to the true test dale is bravely allowing carried a swing of sword towards him 393 00:35:58,600 --> 00:36:03,240 Don't worry. The blade has been dull. All right. So, uh, he's just coming at you like this 394 00:36:05,160 --> 00:36:07,160 So, let me just get the spot 395 00:36:08,680 --> 00:36:12,360 What you have a lot of confidence in her a lot more than we do 396 00:36:14,680 --> 00:36:20,360 For extra protection he's wearing shuko on his hands reproduction ninja climbing claws 397 00:36:20,840 --> 00:36:23,720 So go like this. Yeah, you'd be starting with your left foot forward 398 00:36:24,360 --> 00:36:27,320 And then taking a step getting some momentum and kaboom 399 00:36:28,440 --> 00:36:32,920 Okay, don't hold back carry carry summons up her best kaboom 400 00:36:35,400 --> 00:36:39,880 I'm gonna get you or just the sword. No, that's scary though. Okay 401 00:36:41,320 --> 00:36:43,000 You almost got him that time wow 402 00:36:43,000 --> 00:36:47,320 With 40 years of training under his black belt. That's some force behind it 403 00:36:47,800 --> 00:36:50,760 Dale blocks or blows using just one hand 404 00:36:51,560 --> 00:36:55,800 Dale's preferred sword catch technique is different to the one we're testing 405 00:36:56,200 --> 00:36:59,400 So what's his take on the bare double-handed approach? 406 00:37:00,280 --> 00:37:04,440 The idea of trying to stop it this way with all that kinetic energy still coming here 407 00:37:05,000 --> 00:37:08,120 Is probably not a good idea if you were to attempt it and try to make it work 408 00:37:08,200 --> 00:37:12,360 To be best to catch and receive so you're absorbing and redirecting the force 409 00:37:16,360 --> 00:37:20,200 That's taking hand goodbye, but I think I'll just wave and thank you so much 410 00:37:20,200 --> 00:37:23,560 Thank you. Yeah. Yeah. Thank you. Good to see you guys. High five, huh? 411 00:37:23,800 --> 00:37:25,800 Yeah 412 00:37:26,120 --> 00:37:32,680 Look at that slice back at the shop armed with dale's input and the sorry condition of their fake hands 413 00:37:33,080 --> 00:37:35,080 What conclusion has the team come to? 414 00:37:36,200 --> 00:37:38,200 So, yeah bare hands 415 00:37:38,680 --> 00:37:43,560 The timing was perfect and the hands came together at the perfect time with the most human strength 416 00:37:43,560 --> 00:37:49,160 We can muster and still couldn't hold on to it. Are we calm this one busted? Yeah, pretty much unless you're a movie ninja 417 00:37:49,160 --> 00:37:53,320 I don't think that you can hold on to the sword. There's just too much velocity behind it. Yep 418 00:37:53,560 --> 00:37:55,560 We gave this one our best shot 419 00:37:55,560 --> 00:37:57,560 See, you mean all those ninja movies were not true 420 00:38:12,120 --> 00:38:18,360 Attempting the mythical ninja trick of walking on water adam went nowhere but under 421 00:38:24,520 --> 00:38:28,040 But as the silent observer of his numerous dunkings 422 00:38:28,520 --> 00:38:32,440 Jamie's had time to think and he's come up with a mysterious solution 423 00:38:33,240 --> 00:38:36,600 There is something that I've come up with that you can't walk on it 424 00:38:37,240 --> 00:38:39,240 Does have a lot of water in it 425 00:38:40,200 --> 00:38:42,200 I'd like to see how that works 426 00:38:43,080 --> 00:38:46,680 His covert concoction is 200 gallons of water 427 00:38:47,800 --> 00:38:51,640 And 1 000 pounds of powdery cornstarch 428 00:38:54,520 --> 00:38:59,000 Trusted mithtern Jess is in charge of getting the consistency just right 429 00:39:04,440 --> 00:39:07,160 Some blue food coloring completes the recipe 430 00:39:10,040 --> 00:39:13,080 Okay, we're good. Are we ready to pour? Yeah, anywhere 431 00:39:14,280 --> 00:39:19,640 The mixture is tipped into a large plastic container that represents a deep samurai moat 432 00:39:24,520 --> 00:39:28,680 Adam is perplexed. What is this stuff? It's water 433 00:39:29,800 --> 00:39:36,200 It's got some else in it, but it's water. It's a hinderman version of water. Yeah, and you're gonna walk on it 434 00:39:37,080 --> 00:39:43,720 No way way, there's nothing adam would rather do than play in a giant taboo goo 435 00:39:44,680 --> 00:39:46,680 Look at this 436 00:39:46,920 --> 00:39:48,920 Ha ha ha 437 00:39:50,440 --> 00:39:57,160 Finally the container is filled to the brim and our ninja novice soaks up some advice from sensei hinderman 438 00:39:57,320 --> 00:40:03,320 I think you ought to get one good stride across it as far as hanging out there and walking around 439 00:40:03,880 --> 00:40:05,880 Or even hopping. I have my doubts 440 00:40:06,680 --> 00:40:08,520 All right, well, I want to go 441 00:40:08,520 --> 00:40:13,240 Adam scales the imaginary wall and is ready to cross the water obstacle 442 00:40:13,880 --> 00:40:17,160 Think like those movies where they're walking up bamboo and stuff, you know 443 00:40:28,520 --> 00:40:30,520 That is so cool 444 00:40:33,000 --> 00:40:37,400 Hey, it worked it sure did adam ran across the surface 445 00:40:37,560 --> 00:40:45,880 The reason is the cornstarch and water combo is a non-newtonian fluid and these kinds of fluids change their viscosity 446 00:40:46,520 --> 00:40:51,000 It looks like a liquid. It pours like a liquid, but when you want to run across it 447 00:40:52,680 --> 00:40:57,160 You're fine because the impact of your feet is enough to change that balance 448 00:40:57,560 --> 00:41:01,000 All of a sudden you've got a solid that you're dealing with only for a second 449 00:41:01,320 --> 00:41:04,760 But it's long enough for you to move across the top of it without sinking into it 450 00:41:05,080 --> 00:41:12,200 I'm just gonna go back and forth a couple of times because it's really fun adam shatters the perception that shadow warriors don't know how to have a good time 451 00:41:20,120 --> 00:41:23,320 Dude, it's a lot of work big ninja is a hard job 452 00:41:26,600 --> 00:41:28,600 It wants to let you go down doesn't it? 453 00:41:29,000 --> 00:41:36,600 All right, so this is just to show there's no trickery involved. This is actually liquid. I'm gonna step into it 454 00:41:37,000 --> 00:41:39,560 I'm gonna sink then I'm gonna change my clothes 455 00:41:44,520 --> 00:41:46,520 Oh, that's funky 456 00:41:51,160 --> 00:41:54,840 So it's a far-fetched idea for feudal japanese times 457 00:41:55,080 --> 00:42:03,160 But corn was introduced to japan around the 16th century right around the time ninjas existed and it sure was fun 458 00:42:03,480 --> 00:42:05,480 Oh, come on in the water's great 459 00:42:05,800 --> 00:42:09,720 Of course, this is a little on the silly side. I mean, yes, it's a liquid 460 00:42:09,880 --> 00:42:13,080 But uh, are you really gonna have large quantities of 461 00:42:13,560 --> 00:42:15,960 Corn starch mixed up and sitting around someplace 462 00:42:16,040 --> 00:42:23,400 I suppose maybe next to a corn starch factory in Asia somewhere and you happen to be a ninja and you happen to be trying to sneak around 463 00:42:24,120 --> 00:42:26,120 It's a bit of stretch 464 00:42:26,840 --> 00:42:32,120 All right, so this is the end of the line for walking on water. What do you think? It's busted totally busted 465 00:42:33,000 --> 00:42:35,000 Let's go home. All right 466 00:42:40,280 --> 00:42:43,560 Adam i'm a little concerned about upsetting the ninja community 467 00:42:44,440 --> 00:42:46,840 Really? I mean come on. How many of them could there be left? 468 00:42:47,480 --> 00:42:49,480 Ah 469 00:42:49,800 --> 00:42:55,960 Do you want to know what the ask a ninja ninja really thinks log on to discovery.com slash myth busters to find out 470 00:42:56,120 --> 00:42:58,120 It looks like a buddy of mine 471 00:42:58,440 --> 00:43:03,240 Didn't get enough watch bloopers behind the scenes clips and buster getting battered 472 00:43:03,560 --> 00:43:07,560 Stop by the video gallery at discovery.com slash myth busters