I also remember when I watched Henry: Portrait of a Serial Killer [1990] at, like, age 15. That scared the crap out of me. Because it didn't operate inside the usual conventions of the horror genre in the way that I could accept. I can accept horny teenager counselors being murdered at camp. But I couldn't accept the derangement of Henry: Portrait of a Serial Killer, which was that anyone could be murdered at any moment - whole families, with no build-up music and no meaning. It terrified me.