Here's Felix Baumgartner's plan: Float a balloon to 120,000 feet. Jump out. Break the sound barrier. Don't die. Simple, right?
If Baumgartner, a world famous base jumper and skydiver, pulls off the feat, he'll set the record for the world's highest jump and become the first person to break the sound barrier with his body alone. During the jump, he'll also collect data on how the human body reacts to a fall from such heights, which could be useful for planning orbital escape plans for future space tourists and astronauts.