1. Stone angels.
2. Cracks in the wall.
3. Looking out of the corner of my eye.
4. Walking past a closed door. (I now have to pay attention to which doors are closed—and which ones are open.)
5. Just remembering The Silence and what they can do.
6. Old people.
7. People in comas.
8. Small children.
9. Venetians.
10. Aliens of just about any sort. Oh wait, those already freaked me the **** out.