It's funny to go back and look at movies or scenes that scared you as a kid, only to realize how tame they seem now that you're an adult. We had an HBO/The Movie Channel package while I was growing up, and that was how I saw a lot of movies that I probably wouldn't have been allowed to see.
Horror movies are obvious choices--I was pretty young when I saw Betsy Palmer get her head lopped off in Friday the 13th, which was freaky. (Of course, now it's a chuckle-worthy effect.)
But I remember loads of scenes in non-horror flicks that creeped me out. One example is in Flash Gordon (1980), when Flash had to reach inside that rock and hope he didn't get stung. I saw it dozens of times, but I was on pins and needles every time it came to that part.
The Garthim in The Dark Crystal were freaky, but as scary as I thought they were, I was always drawing them.
I'm sure I'll think of more examples, but in the meantime, let's hear some of yours.
Horror movies are obvious choices--I was pretty young when I saw Betsy Palmer get her head lopped off in Friday the 13th, which was freaky. (Of course, now it's a chuckle-worthy effect.)
But I remember loads of scenes in non-horror flicks that creeped me out. One example is in Flash Gordon (1980), when Flash had to reach inside that rock and hope he didn't get stung. I saw it dozens of times, but I was on pins and needles every time it came to that part.
The Garthim in The Dark Crystal were freaky, but as scary as I thought they were, I was always drawing them.

I'm sure I'll think of more examples, but in the meantime, let's hear some of yours.