When two skydivers collide, one of them plummets, completely unconscious, at 14,000 feet. How does a man who has lost consciousness perform a landing? Our experts break it down, and also look at the incredible story of a skier who fell 30 feet down a crevasse and somehow lived to tell the tale.

When two skydivers collide, one of them plummets, completely unconscious, at 14,000 feet. How does a man who has lost consciousness perform a landing? Our experts break it down, and also look at the incredible story of a skier who fell 30 feet down a crevasse and somehow lived to tell the tale.