Cracked pays people to make smart memes. Visit the Photoplasty and Pictofacts Workshop to get in on it.
The human body is weird, that's an undisputed fact. The thing is, a surprising number of our bodies are even weirder than the rest. There are tons of neat, quirky physical things that only some of us can do.
Props to TasteisSweet, for doing that crazy leg-twitchy thing that inspired this contest.