Evil Kids who hang out alone.
Exorcism in any forms
People with wierd faces, or dogs with upside down heads (WTF?)
Things (hands, heads, hot-dogs) popping out of walls
Guys in big raincoats with knives
I mean the list just keeps on going. Either way, people like being scared, it helps cope with the frightening times. I personally won't be seeing "The Unborn", I'm holding out for "My Bloody Valentine" in 3D, which I anticipate to be more wild than my dreams (which are looney).