What movie went too far -- in the best possible way?S

Sometimes you know a movie has gone too far. A girl has to sacrifice a fluffy kitten to appease Satan, say, or a hero is killed senselessly with a pole to the head. But it just works. Tell us about a movie that works that way for you.

It's the rare movie that can push things too far, and yet still be in exactly the right place. But they are out there! What's your favorite? Post images, videos, or links to illustrate your point and help us survive Thursday afternoon.