Hand In Water While Asleep Makes You Urinate
Explanation:Any person who's ever gone to summer camp or watched enough summer camp movies has heard of the classic prank of dunking a sleeping person's hand in water to make them urinate. Supposedly, the unconscious sensation of water will stimulate a sleeper's bladder and burst open the embarrassing floodgates.
Plenty of anecdotal stories claim the myth holds true, but MythBusters Jamie Hyneman and Adam Savage decided to take it for a swim themselves.
The key to pulling off the prank is ensuring that the person in bed is actually asleep. For that, Jamie, Adam and crew member Matt each took turns getting hooked up to sleep monitoring equipment and catching some Z's. Jamie couldn't settle down enough to fall asleep, but Adam and Matt snoozed like champs.
Unfortunately, the hand-in-water trick didn't perform so well, resulting in zero wet beds. Pranksters might protest, but the MythBusters pee test was a big, fat bust.