Top 50 scariest movies of all time
43. Paranormal Activity (2007)
Memorable quote: I feel it. I feel it breathing on me.
Scare factor: This low-budget, single-camera movie, shot in the first-person style popularized by "The Blair Witch Project," is simple and effective. It eschews story and visual effects for the slow build, and unlike so many similar films, all that building tension really pays off.