Do you think “I know it like the back of my hand” is a silly phrase, since you have never paid particular attention to the back of your hands? The MythBusters found out that we really do know the backs of our hands, better than we know other body parts.
Also, professional pitchers cannot throw a needle through a sheet of glass without shattering the glass, but the air gun succeeded. Bicycles can be ridden underwater but not well. And the potty dance and/or meditation may or may not help you stave off the need to go to the bathroom.
Tags: discovery channel, Mythbusters, television