http://www.collegehumor.com/video:1732963/ Check out this video... neat illusion. If you slow it down/pause it, you can see how he did it. Spoiler at about 14 seconds in you can see that it's a second shoe lace, the shoe is tied the whole time, at about 14 seconds, he pulls the untied shoe lace up his pants and reveals the shoe already tied...
He didn't. Those shoe laces tied themselves.. clearly that man is in works with the devil I don't trust magicians http://youtube.com/watch?v=wYbomoAHV4Y
Spoiler he's gotta be using his hand in his pocket or something to pull it up, you never see it, cause the camera is just focusing on his shoe if you slow it down, just play/pause/play/pause, you can totally see it.