5. Ju-on (2002)
Memorable quote: Eeeeeeeooooooooooow.
Scare factor: There is perhaps no movie in history with creepier children than this classic Japanese haunted house/ghost story. The one that stands there, frozen-faced, mouth-agape, while meowing will keep you up at night. Add in a creepy low-key soundtrack and some legitimately striking visual scares and you have a recipe for instant nightmares. Oh, and don't forget the single scariest scene involving a staircase in cinematic history.