On YouTube there's a video of magician Criss Angel taking the old "sawing a woman in half" trick a step further. He actually pulls a woman in half, whereupon her upper half crawls away in horror while her legs remain behind wriggling. I, like many other people, have been trying to figure out how he does this trick. All I can conclude is that it's achieved by clever editing of the camera footage. (Which, if true, would make it less a magic trick than a special effect, but entertaining nonetheless.) My reasoning is that the (half of a) woman who crawls away at the end is probably not fake. She's likely a woman who, in real life, has no legs. But this cannot be the same woman who initially walks to the table and lies down on it. (No, I don't think she was using robotic legs, or anything like that.) They are two different women. Which means that at some point the camera must have been turned off, and the one woman replaced the other on the table. This also suggests that everyone in the crowd were actors. That's my theory. But I'm actually hoping it's wrong, because it would be cool if he could have done this without turning the camera off at some point. (Thanks to Captain DaFt for the link.) (And I could have sworn I once posted about another Criss Angel trick in which he crawled through a glass window pane, but for the life of me I can't find the post about this.)

Update: Archibold pointed out that Snopes has a page about this video in which they point out that Ricky Jay has written about a similar early version of this trick in Learned Pigs & Fireproof Women. Sure enough, he has. Participating in this early version of the trick was Johnny Eck, a legless & thighless man who starred in the movie Freaks. So I was right about the woman at the end of the video actually being a legless woman. But this leaves the question: was the woman standing in the crowd also the same legless woman? If so, that's amazing. If not, then I still have no idea how a switch could have been made without the camera being shut off. But I've now got to assume that it's a real trick and no camera tricks were employed.