Besides
Gigli? j/k
Halloween...hands down. Actually, I think the scariest thing I watch is Ghost Hunters.
I also think some of the scariest movies are those that aren't really
scary per say, but that have maybe one or two parts that are just kind of creepy and disturbing.
Like
The Blair Witch Project-not really scary to me, but the guy standing in the corner at the end just kind of stuck with me...for weeks I found myself looking in the corner to make sure someone wasn't there.
Another is the part of
Signs when he sees the reflection of the alien in the TV...I STILL will not watch this part...days after I was afraid to look at a turned off TV.