Magic trick

David Copperfield is doing his magic show and asks if anyone could show him a trick he's never seen before. "I will", replies a guy in the audience, "but I'm going to need your wife Claudia and a table." "Ok", says David and the guy gets up on stage. He then bends Claudia over the table, pulls down her panties and starts doing her from behind. David is now very pissed off and says, "That isn't a trick!" The guy just looks at David Copperfield and replies, "I know, it's fucking magic."