I was exposed to adult horror movies at the early age of 7. From the Exorcist to the Return of the Living. Strangely, what freaked me out the most was the scene in nightmare on elm street when the bed swallowed up the sleeping teen and then vomited up blood all over the ceiling.
“If you worry about what might be, and wonder what might have been, you will ignore what is.” -anonymous
Haha... but why did that freak you out? The theme song or was the movie itself creepy?
There's a demon overlord called Malmoth in the cartoon who wants to capture Clementine's soul in every episode, and uses numerous human minions for that purpose... It eventually punishes minions that fail by turning them into worms and insects and then throwing them in fire...
I wasnt allowed to watch movies deemed "too scary" until a certain age. I had to wait till I turned 8 to watch Gremlins and Gremlins 2, for example. I remember begging my parents to let me watch it, but they were firm; not until I was 8. I was into monsters as a kid, though I dont think any movie really freaked me out that I remember. My parents were not really into horror films like the Excorcist and Poltergeist, in fact it seems like they still hate those movies. I love horror films though.
I used to have nightmares about the Count from Sesame Street. He wanted to eat my toes, which would only be safe by making sure they weren't sticking out of the covers. Also the little people from Time Bandits created many a nightmare. Mostly it's because of how they were introduced, breaking out of the closet into the kid's bedroom from another dimension.
Sleeping Beauty and Pinocchio where the only animated movies that scarred me growing up I watched them both in Kindergarden. Outside of that the only time a movie scared me was when a character was screaming at their child in the House on the prairie.