one i had forgotten to mention earlier, and hadn't seen it on anyone else's list - the Mothman Prophesies.

If you are at all a sci-fi/thriller movie-type fan, this one's a doozy and all "based" on a true story. Pretty good use of surrounds as well. Of course, you'll have to put up with Richard Gere for 2 hours.

"Chickens don't clap."