Not all horror movies are pure fiction.
This is to say, real life can be just as creepy and inexplicable as a carefully crafted movie. There are countless stories of things that go bump in the dark, creepy run-ins with strangers, and strange ghost-like "haunting" experiences.
I’m a criminal defense investigator. I had a murder case involving two brothers. The one accused of the murders was very autistic, and his brother was a schizophrenic. The schizophrenic brother lived in a potato shack in the middle of the desert.
I needed to talk to him several times throughout the course of the investigation, and since he didn’t have a phone or electricity, I had to drive several hours out to his house and yell his name from the fence line until he came out of the shack.