When Fight Club first hit theaters back in 1999, it received a lot of attention for its genuinely shocking plot twist. Nobody expected Tyler and the Narrator to be the same person, yet maybe they should have, because there are tons of Easter eggs in Fight Club.
Director David Fincher crammed Fight Club secrets and genius foreshadowing into every available frame. Most go by so quickly it's almost impossible for first-time audiences to notice, but there are definitely a few in there that everyone should have picked up on.
After knowing the twist, it becomes much easier to notice the little things that give it away: shared boxers, impossible phone calls, shifting car seats. Even after multiple viewings, there may still be some brilliant instances of foreshadowing you missed. Be sure to also check out more shows and movies like Fight Club.