Trying to find a movie with a crazy plot twist that no one would have seen coming at the end.

I've been getting my fiance into moves. No matter what movie we watch, she always seem to guess correctly who dies, what comes next, etc and it's starting to bug me. I've been going down IMDB top 250 to find a movie where she would never guess the ending. She has never seen these movies before and I'm amazed that she always ends up guessing the plot twist correctly either around midpoint or before the reveal. The Shawshank Redemption, The Sixth Sense (10 minutes into the movie), Fight Club, The Prestige (she said, who's that guy that's always around Christian Bale and guess correctly), Memento, Lucky Number Sle7en, The Usual Suspects, Gone Girl, The Departed, Oldboy, Life of Pi, Identity, Harry Potter series, Shutter Island, even Intersteller and Inception.