My dads brother visited us one time - when I was around 7 years old - and they sent me to bed and watched a movie together on TV. I’m not sure where my mom was, perhaps taking care of my little brother, but I quietly went down the stairs and saw them watching the movie, and I stayed very quietly so they would not know I’m there.
It was a Bruce Lee movie, “The Big Boss (1971)”. In that movie Bruce works at a ice factory and his boss kills some people and puts them into the ice. That’s not the worst of it. They then have those big ice blocks and a big blade saw and that saw cuts the big blocks into smaller peaces. It also cuts those bodies in the ice blocks into smaller pieces.
I couldn’t believe what I saw and went back upstairs and couldn’t fall asleep. I never told my parents.
Omen, Excorcist, Nightmare on Elm St, Jason, Cujo, Friday the 13th - I was a very free range kid. The one that really sticks out is (IIRC) The Amityville Horror. There is a scene with these red glowing eyes down a dark hallway…the adult in me knows it was probably just some guy with two flashlights, but it still raises the hairs on my arms thinking about it