"The bottom half of the lady stood up. What you don't know is that this video is edited SO much. The bench is different and the owner of those legs, most of her body is in the bench. The crowd is in on the trick. It's why I hate Criss Angel. He uses too many stooges, camera edits and fake spectators."
hehe, pretty good, but probably there are two persons there, a small dude on the top and one to act like legs, and he is probably inside that box, thats like they do most of the time.
It's pretty much what ^^ he said. It's a contortionist. Some magicians have used double leg amputees, but this one is a contortionist. A really thin one. The mask and hat are bulked out to give the illusion of a larger sized man.
They cut a middle portion of the trick out. The middle bit makes it a bit more obvious.
The part where they staple him together is just the top half curled on his side. You can see that the legs are attached as he turns. The magician is blocking it, but you can see the legs move.