How does he do that?

I love a good magician.  I know it's a trick.  I know there's a logical explanation, but how does he do that? I've been watching America's got Talent and they have three magicians in the top 12 this year, all of them very good and all very imaginative.  Not one of them has sawed a girl in half or stabbed swords through someone stuck in a box.  I tend to enjoy the close up sleight of hand tricks most, In fact I find myself thinking that a magician might actually win this year, until I watch the dancers, and listen to the singers. Who knows?