For four seconds, 138 skydivers joined together in midair, holding hands and forming a star-like formation. Their synchronized jump set a world record for largest formation, but it wasn't as easy as it sounds.
Oh, it doesn't sound easy? Well it wasn't. Jumpers took 3 days and 15 attempts to complete the feat, and that's not including tryouts for potential participants to be sure they had what it took.
See the story at Discovery News.