One of the things that freak me out the most is the thought of waking up blind one day... like the movie Blindness - I saw the preview for it and the story looks fantastic (it's based on a book, of course.) In a nutshell, it's about a society suffering through an epidemic of blindness.

Julianne Moore stars in it (She must be super skinny, because she actually wears a fatsuit for her role), along with Mark Ruffalo and Danny Glover.

If you like horror, or are morbidly curious like me, check it out.