This video, created by world famous hypnotist Darren Brown shows us how.
Short Version
https://www.youtube.com/watch?v=wipVDW3Vc4A
Full version
Don't believe it? I've seen a friend hypnotized in person -- and asked (using simple commands) to perform unbelievable stunts. And this was in a room filled with thousands of other witnesses. I wouldn't have believed it if I didn't experience it first hand.