You guys have named some good ones. Sixth Sense would have been on my list except that I got a huge clue from an awards show I watched before seeing the movie. I had avoided everything Sixth Sense since I had heard it had a great ending. Whenever anyone brought it up, I would leave the room. Well, one night (if you haven't seen it & intend to, please don't read any further) I was watching the People's Choice Awards & was about to turn off the TV when they were about to give out "favorite actor". I decided to see who won, & when the guy opened the envelope, he said "a very much alive Bruce Willis" !!!! I was so mad I screamed at the dumb guy on the TV. DH was asleep, so I didn't tell him, but it was so dissappointing to watch that movie & basically know what the twist was.