Per wiki policy, Spoilers Off applies here and all spoilers are unmarked. You Have Been Warned.
- The Director's Cut ending. Evan kills himself in his mother's womb, and everybody else gets a happy ending.
- Kayleigh furiously telling Evan about why he didn't just visit or call her after years of abuse and hell near the beginning of the movie. Then she kills herself.
- The theatrical ending: Evan hurts Kayleigh when they were kids in order to make her and Tommy move away from their father and be with their mother, the result leading to the two (especially Tommy) to have successful futures and happy lives all away from him. The fact Evan sees her walking the street one last time but not go catch up to her makes it more bittersweet, superimposed by Oasis's "Stop Crying Your Heart Out".