The ending - SPOILERS
I thank God I didn't even look here before seeing the movie! If I had known there was a twist to the ending it would have really spoiled it. That's the main problem with most movies of this sort. Just knowing there's a twist can spoil it.
Anyway, I didn't know, and it was great! I sure never saw it coming.
"The more you drive, the less intelligent you are"
-- Repo Man
ps. Actually, the problem isn't with the movie -- it's that everyone seems to think it's okay to announce a "twist" or "surprise" ending. Even the external reviewers are doing it!