You're a kid again, out trick or treating on Halloween night, what would be something that would frighten you for real?

Yeah one thing that would go beyond the high jinks & fake “scariness” normally associated with the evening. Something thoroughly creepy that although doesn’t ruin the enjoyment for you, certainly throws a spanner in the works.I don’t really know what answers I expect to find. Just wondering what comes up I suppose. I mean, simple humorous imagination will do.