Hangtime!
AS SEEN ON THE ELLEN DEGENERES SHOW!
How high can you jump? Hangtime helps you measure your awesomeness by timing your airborn-ness. Just put it in your pocket and leap into the air!
WARNING: Whatever you do, do not THROW YOUR PHONE IN THE AIR. It would definitely be a bad idea, no matter how much fun it is. Sure, this app works well for that, too, but its a bad idea. Throwing phone, bad. Effective, but bad. Awesome, but bad.