The mention of the AMC thing reminded me: there's a part on there where Rob Zombie (House of 1000 Corpses and this weeks sequel The Devil's Rejects) mentions the one film that he thought was just too disturbing for words: a japanese film called Audition.
So rent this from Netflix. I have to agree with him.
The film starts off almost like a romantic comedy. This young filmmaker loses his wife. Years later, filmmaker's now almost grown son says that he should get out and date, maybe remarry. So he and his buddy have a zany sitcom idea worth of Lucille Ball: they hold auditions for a fake movie in order for filmmaker to read dozens of detailed resumes of young actresses and get to see them act so filmmaker can pick someone nice to date and marry.
Hilarity definately does not ensue.
It's cute and endearing and even a little funny. Then he becomes interested in this girl and they begin to get closer. Guy's best buddy says he gets weird vibes off her but guy is in love and not hearing any of this. As he begins to find out more and more about her, the nice little life she's put down on paper begins to unravel .. slowly at first, then more quickly. The final scenes are gruesome beyond description. When your date puts on a leather apron and unrolls a rubber mat on the living room floor, you just know things ain't gonna go well.