Stephen King's IT.

Tim Curry is a phenomenal actor.

https://en.wikipedia.org/wiki/Leptirica

That was scaaary for young kids, I was afraid to watch it again 30 years after. Now it is almost funny.

Here is the link if you want to check it out: https://youtube.com/watch?vojhfYK0T5c

Fantasia, not specifically the Night on bald mountain section, but the bits with the orchestra.

Also a TV series in the UK called Mealstrom. The paintings would come to life, which was ok but the intro was creepy AF https://youtu.be/_FwP5LAXd7U

Threads (1984). Still one of the most realistically possibje horror films ever made. The BBC banned its re-airing for 40 years due to being too disturbing.

The Exorcist, specifically the part where she runs down the stairs upside down on all 4s and screams. Me and my brother cried forever that night lol

Maximum Overdrive. It has taken me until adulthood to get over the irrational fear that big machines like trucks will come alive and drive me over. For many, many years I always got a slightly uneasy feeling when I'm cycling and a big truck goes by (even though I live in a country with good bike infrastructure and bike on separated bike paths). Even now at 26 I occasionally get the feeling. It's silly, and I've mostly gotten over it. I guess my interest in cars and anything mechanical has helped me get over it, thankfully curiosity is sometimes strong than fear.

Funnily enough I occasionally listen to AC/DC and at some long ago point I stumbled upon their album "Who Made Who" and it became a favourite of mine. It was only a few years ago I realized that the album is the soundtrack to Maximum Overdrive!

Several years ago I actually bought a DVD copy of the movie; it's still wrapped in plastic to this day. It's not that I'm scared to see it, I just haven't gotten around to it yet, and by now I'm unsure where it even is any more.

Wrath of Kahn.

I was not ready for the ear worm scene.

The Tall Man from Phantasm scared the shit out of me

I still have a nightmare once a decade about him chasing me screaming "BOY!"

killer klowns from outer space. now as an adult i find out its considered a comedy!

An American Werewolf in London. My parents were watching it when I was like 6. The opening sequence on the moors scared the hell out of me, and they decided I should go to bed. I think they had heard it was a comedy, so weren't prepared for actual horror. That scene stuck with me for like 20 years before I ever rewatched it. It's a good movie as an adult.

The Grudge. The Japanese original and the US ones.

Miss Peregrine's Home for Peculiar Children

“Pokemon: Jirachi, Wish Maker” for me. It had this really creepy Groudon with tentacles.

SAW

The Strangers. I lived in a house similarly isolated with a sliding glass door just like the one in the movie where she moves the curtain and he’s right there staring in.

The Haunting (1963) b/w spook house horror Had a lot experience with Monster Films from Jack Arnold (Tarantula) and Godzillas, but this hit totally unexpected. Didnt help i was watching it in the middle of the night on TV.

Child's Play. I was, like, 5? when I watched it. A lot of my toys ended in my older sister's room because I couldn't stand them, I was afraid that they'd chase me.

Snow White and the Seven Dwarfs. The old animated one by Disney. The Witch/Evil Queen scenes would always scare the living shit out of little old me! When my sister and I would watch the movie with our grandparents, they would have to fast-forward through those bits.

Something was on TV and I have no idea what it was nor do I care to try to find it. Someone was in the hospital and transformed into some sort of monster while the nurse was out of the room and when she came back in it reached out from under the hospital bed and ripped her fucking leg off. I'd never had thoughts about monsters under the bed before but after that I always jumped as far away from the edge of the bed as possible when I got out.

I watched Halloween for the first time when I was in like 3rd grade. It was even the dumbed down version on TNT with commercials, but I ended up waking up in the middle of the night and puking over the railing of the top bunk. Poor sister was on the bottom.

I vividly remember watching everyone clean up my puke while I sat up there lol.

Anyway, I fucking love horror movies now. What an origin story.