Trivia: Just in case you haven't seen the extras, the man in one of the first scenes in the diner who disappears while reading the paper in the booth is Owen, the same guy that helps them out of the prison at the end, possibly making him some sort of guardian angel for the two? (You have to see the alternate ending though).
Trivia: This film inspired over a dozen copycat murders, some of which involved imagery and dialogue from the movie. One victim's family even attempted to sue Warner Brothers.
Trivia: Director Oliver Stone chose Woody Harrelson for the role of Mickey based on the fact that Woody's real father was arrested/convicted of murder as a hitman. Stone was quoted as saying "I could see that killer instinct in Woody's eyes, and although it scared me, he was perfect for this role."
Trivia: Director Oliver Stone wanted singer Tori Amos for the role of Mallory. She was interested in the role until Oliver told Tori that he also wanted to use her song "A Gun And Me" to play every time Mallory kills somebody. The song was an account of Tori's real life rape. Tori responded by slapping Oliver hard in the face and then walking away.