These Incredible Gravity Defying Things Will Make You Look Twice

The Road Runner cartoons play fast and loose with gravity. Given the opportunity, Wile E. Coyote usually chases his quick-footed foe off the edge of a cliff -- but only plummets when he realizes he's running on thin air. Needless to say, gravity doesn't work like this in real life. But what's going on when boulders or Acme anvils plummet to the Earth? Let's start with your feet and work our way up to, oh, the entire universe. Grab a chair, because this is going to take an entire page to explain.