The only scary movies I've seen (and I've seen a lot of scary movies!) are :
Night of the Living Dead. (The original)
The Texas Chainsaw Massacare.
The Texas Chainsaw Massacare II
Children Should Not Play With Dead Things
I guess I've just gotten to damn brave over the years to let a movie scare me cause nothing on the screen today has any affect on my scary-isn-nes.
Especially anything by Mr. King.
There was once a scary "book" written by a Protestant Bishop called THE OTHER SIDE in which the author tell the story about his drug addicted son and conversing with him after the son's drug induced death.
And one other very scary book (The name of which I have forgotten) about a town in Germany whose inhabitants ate some "wheat" that causes everyone to hallucinate and commit unspeakable crimes to one another. Based on fact.
That's about the extent of my scariness.