Jaws
Poltergeist
Aracnaphobia
That's just based on the ability for horror movies to stick with me. If I see the ocean, I think "sharks" simply because of the movie jaws. If I see static on a TV, I think of "poltergeist" (which was voted to have the scariest villain ever). If I see a house spider, I automatically decide if its similar to the ones I saw in aracnaphobia. Hollywood has fallen into the trap of scary meaning "startling". You don't realize just how scary a movie is until 10-20 years later.