People who dress up as clowns scare me but not as much as dolls who are clowns. Quit looking at me clown-doll. You are freaking me out.
Also, I became quite terrified of the attic after watching The Exorcist when I was about 10 years old. I was at a friend's house and her parents let us watch it. I had to sleep with a light on for a good two months after that.
This is embarrassing but... I was terrified of shrubbery for a couple weeks after reading The Shining