Hmmmm ... horror. I watch very few of those but I suppose Jaws was classified as horror and I sort of enjoyed those but I can't watch those weird horror like movies.
I will say that Harrison Ford's 'What Lies Beneath' was pretty scary - LOL
Punkinhead. I've watched nearly every horror movie out, and enjoyed plenty of them, but this one was so scary to me that I've actually forgotten most of it. So I have no idea why it made such an impression, thankfully.