3. The Exorcist (1973)
Memorable quote: The power of Christ compels you! The power of Christ compels you!
Scare factor: No child should ever be that foul-mouthed and that convincingly scary in a movie. Linda Blairs seminal performance is almost enough to make you believe in demons (that is, if you didnt believe in them already). If you havent watched this in a while, do yourself a favor and check out the directors cut, then go ahead and try sleeping afterward. Good luck with that.