I can't think of anything particularly creepy, but I used to be afraid of lots of things and I would always see bunny costumes and weird shadowy things in the corner of my eye.
Also I used to walk home with this girl at primary school, who told me a story where she passed by a house with this girl inside who kept asking to play together. Apparently since she told me the story that girl was supposedly going to find me now and she described the scratchy noises the girl made or something and later that day I heard the same
scratchy noises on my roof. I was creeped out for months.