I will admit, that for a time in my teens, I actually thought the Exorcist was funny. Especially the pea-soup scene. However, those days are long gone. I've heard a quote, and I don't remember from where, but it was something like "When you study evil, you are studied BY evil". That's why I'd have to be pretty loaded to watch that movie again.

There's a legend that I read about back in the early 90's called "The Bell Witch", which was pretty darn creepy. It involves a terrible haunting in the mid-west back around the time of the Civil War. Check this out:

Bell Witch

*EDIT* My timeline for this is wrong...Bell Witch was early 1800's, well before the war. Apologies.