Okay sci-fi horror fans, I need your help. I'm looking for a movie that has a really disturbing scene that I saw as a kid and I don't know the title of the film. Basically a bad guy in a space station gets stuck in a laser cutting machine during a fight scene and it cuts his head off across his mouth. It was really gory, and I remember the bad guy getting up immediately. It was on daytime cable, one of the late 80's pay per view like CVA or First Choice.
Edit: Oh, on another note, you do not find out that it was an alien hiding as a human until the laser beam cuts the person's head off, whereupon it gets up immediately.