The MenTal Corporation Prison (Fortress)
The primary deterrent to escape in this film's dystopian future is something called an "Intestinator" that's implanted in prisoners' stomachs. That should be all you need to know to understand why the prison in this 1992 movie is no fun at all. But just in case you're the inquisitive type, the Intestinator is a small device that causes intense intestinal pain when a guard or anyone else activates it, and can even be detonated if necessary. Even better, the Intestinator is only one of the many creative ways the fictional MenTal Corporation controls inmates in this disturbing sci-fi adventure starring Christopher Lambert.