I'm talking about scary movies you saw when you were old enough to know the difference between movie and reality. Before around age 10 or 11, it's hard for children to distinguish between fantasy and reality so they are more readily affected. I saw this ad for some scary movie which claimed it will disturb your sleep for weeks after viewing it. But the only movie that's ever put that much fear into me was Jaws. For weeks after watching Jaws I hated to be in any bodies of water the size of a public swimming pool or larger. It's not that I didn't go swimming, but when I did go swimming or wading it was accompanied by this really spooky feeling like something dangerous was lurking in the water. No other movie has had that much effect on me after age 12.