Movies that actually scared somebody

I thought the Exorcist was pretty lame. I guess that's the expectations of kids these days...

But, one movie that truly scared me (and really the only one that still gets me) is the beginning of <i>When A Stranger Calls</i>... I had never heard the urban legend before and just thinking about it right now makes my eyes water (what happens when I get scared). The rest of the movie sucks, but the beginning is great.