OK, this is a little weird, and a little gross, but if you're as big a fan of Total Recall as I am, you'll love it. One of the characters in that movie, named Quatto, actually lives in the stomach of another character, and rather than recreate the creepy effect with puppets or makeup, YouTube user minimatefactory just put some high resolution video of the character on his iPad, and then he strapped it to his shirt to wear around.
The effect isn't completely realistic, of course (it looks like he's got a video screen on his stomach), but it is a clever Halloween costume, and clever goes a long way after a few drinks at a Halloween party. Just stay away from bobbing for apples -- you don't want the iPad getting wet or falling into someone's candy bag to take home.
[via Cult of Mac]