There are lots of Faith Healing Tv shows (Benny Hinn and so many) that are shown world wide to fool the people. It would be a nice proof, if Penn and Teller reveals this secret, to show people that Faith Healing is a Bull Shit. I am not saying about the Self faith. I am saying about the person who pretends themselves having some superpower that GOD gave them.
http://www.youtube.com/watch?v=cus1TsMvs3U