The Eye, but not the American version but the foreign one by the Pang Brothers. I don't know what it is but the Asian film makers really know how to do horror, I only wish we could get them in English instead of subtitled. It's so hard trying to do two things at once when watching a movie. But I have seen a TON of scary movies and this one left me feeling scared to walk into a dark room for awhile.
And this is so childish, but there is just something unnerving to me, even as an adult about Candy Man.
I'd love to find one that got me like The Eye did. I LOVE horror and getting scared but it's so hard to scare me anymore. I have found myself disturbed, but not scared since The Eye.