This is a fun show on the Discovery Channel.  I've watched a few episodes...with myths like these:

It's possible to swing all the way around on a swing set.

The daddy long legs the world's most venomous spider.

Diving under water can save you from gunfire.

either busted or confirmed.

"Each week special-effects experts Adam Savage and Jamie Hyneman take on three myths and use modern-day science to show you what's real and what's fiction.  That's right, they do more than explain how something may or may not be scientifically possible. Through trial and error they actually demonstrate it."