Magic revealed: how to break a man into three parts

I'm of two minds when it comes to revealing how to do magic tricks.

On the one hand, it serves to completely ruin the trick in the future - once the magic is shown to be a minor trick, so simple that anyone could do with a bit of practice, the fun of magic seems to go right out the window.

On the other hand, the argument goes, only by revealing how old tricks are done is new magic pioneered and new techniques developed. I suppose that's a fair point, and serves to reward truly original magitians who develop their own mystifying means.

Regardless, actually watching the trick revealed is always a facinating process... below, the famous Penn and Teller reveal their method for dividing a person into three parts. A great watch.