Go full screen for this one. In Changsha, China, Michael Kemeter did the unthinkable. He scaled a tower nearly 900 feet tall with no safety equipment whatsoever. Then he parachuted off in a base jump. What makes guys like this tick? Adrenalin is one thing. But no safety gear at all? One misstep and your life is over? It's caught on tape and a CNN segment is here for you to see. Warning though, if you are afraid of heights, this might freak you out a bit.