MythBusters

Answer: A more complex and complete answer probably isn't possible here, since we're dealing with fluid dynamics, pressure, boundary levels, etc. A simply answer would the air in the bed is kept there by the fast moving air coming off the roof of the cab. If there was no "secondary bubble" of air, you would have a vacuum in the bed. When air comes off the roof, it needs a place to touch down, which it is able to do with the top of the tailgate. The fast flowing air moving over the bed keeps the air that's already inside the bed from "escaping." However, the air in the bed is still moving and creates a vortex in the bed, which is described as a bubble. When the tailgate is down, the air coming off the roof will gather at the back of the cab and create drag.

Bishop73

Star Wars: The Myths Strike Back - S13-E13

Question: When the Myth Busters were testing whether higher ground does give you a huge advantage in sword fighting. Adam and Jamie do the sword fighting themselves, then they ask a sword fighting expert to train them. Why didn't they ask skilled sword fighters to do the fighting instead? It would have been much to easier to determine whether higher ground gives you an advantage by asking experts to do the fighting. Did it actually make sense to ask an expert train them instead of asking experts to do the fighting? If so why?

Answer: Much of the show Adam and Jamie would do various tests themselves to see how much of an advantage something has. The idea being Jamie and Adam are not relying on skill but the advantage they are testing. Even though they do get some training, both their skill levels are essentially at 0. Plus, doing it themselves allows them the chance to talk about the experience. While the experts could have done the tests and discussed the results, some may wonder if the 2 experts were evenly matched to begin with.

Bishop73

James Bond Special: Part 1 - S6-E1

Question: The three magnets Adam brought are same diameter, three times as thick as the other ten magnets. Are they also stronger than the other ten magnets?

Answer: They were all rare earth magnets, but yes, the bigger ones were stronger. With that addition, strong enough to deflect steel bullets.

Friso94

Answer: Without going back to rewatch the episode to be certain, I believe the second batch were Rare Earth magnets, so yes.

Captain Defenestrator

Answer: That may be when he broke his hand on a bulletproof safety shield while filming.

raywest

Pingpong Rescue - S2-E9

Question: Tory, and the other guys working with him pop most of the balloons, and release only a few. Why not release the entire bunch of balloons they made?

Answer: Because releasing helium balloons is dangerous to wildlife who eat the balloons once they have landed and deflated or popped. Releasing all those balloons would be a major risk.

Ssiscool

I thought it was because a plane might run into them.

Thermite vs. Ice - S7-E8

Question: Jamie says he doesn't think it is possible for for hydrogen, and oxygen to be instantaneously created. Why doesn't he think that is possible?

Answer: Mostly because of the sheer volume of hydrogen gas that would need to be created. The bonds that hold together water molecules are pretty strong, but even with the kind of heat thermite produces, you might get some of that effect, but not nearly enough to destroy a huge block of ice.

Friso94

Did Jamie ever explain why he doesn't believe that it's possible for hydrogen, and oxygen to be instantaneously created?

Seasickness: Kill or Cure - S3-E24

Question: It has already been proven that if you put your finger in a shotgun barrel you will lose your hand. Would you also lose your hand if you put your finger in a pistol barrel?

Answer: No. You would definitely lose a finger or 2 though. A shotgun has a wide barrel compared to a pistol.

stiiggy

Answer: The barrel can get hot if it is fired quickly. Revolvers allow hot gasses to escape from the front of the cylinder so you should keep your hand way from the gap. But if the barrel is not too hot and you keep your hand away from anything it should not be near, just touching the barrel will not hurt your hand.

I meant would a blast from a pistol firing blow off your hand as a blast from a shotgun firing?

James Bond Special: Part 1 - S6-E1

Question: Couldn't Adam, and Jamie have made ten magnets with the same diameter, but much longer than the other ten circular magnets they used? Those type of magnets would be able to contain a lot more energy, and generate more pull than the circular ones they used.

Answer: Maybe so, However as is shown on the show, they often mess up or make silly errors.

Ssiscool

So, why don't they try to make stronger magnets?

Sometimes budget or recording schedule doesn't allow.

Ssiscool

Duct Tape Canyon - S11-E8

Revealing mistake: When Jamie sits down after rappelling down the canyon wall you can see that he has climbing rope attached to his harness. It's wrapped in duct tape to look like its the rope he and Adam made of duct tape. This may just be a safety line to support his weight if he duct tape rope snaps, but the Mythbusters usually point out any backup safety systems and explain that they are there for caution and don't contribute to the test. (This was explained in the aftershow. It was a safety line required by the shows insurers).

Grumpy Scot

More mistakes in MythBusters

Adam: Am I missing an eyebrow?

More quotes from MythBusters

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