Really great creepy scenes!

What are some of the most disturbing scenes in a movie or book? Please exclude sex scenes, 'because those gross me out. First nomination, off the top of my head: The scene in the movie Trainspotting (starring Ewan McGregor) , with the dead baby crawling...

on the ceiling. See, stuff like that.

Requiem for a Dream- when they are strung out and the refrigerator moves.
Pi- almost the whole movie but especially the scene at the end where he drills his own brains out.