In this trailer for the Lions Gate horror movie, "Saw," an erie voice drones, "The device you are wearing is hooked into your jaws. When the timer in the back goes off, your mouth will be ripped open." Horror movies used to be scary. This one looks like it might bring back edge of your seat fear. With the flash graphics, "How Messed Up Is That?" this is clearly one messed up movie. Coming this fall.