It's not so much scary as gross, and not so much horror but a thriller, but has anyone seen The Human Centipede? Weirdest thing I've ever seen!
The ring! THE FREAKING RING!
Seriously, never watch it. That film does things to your head. You can just imagine it happening to you one day.
In fact, even nowadays I occasionally check security camera monitors to make sure my face isn't blurred in them...