Trivia: In the film, the two transfer students are Kiriyama, the silent killer, and Kawada, the winner of a previous Battle Royale. In the original novel, only Kawada was the transfer student; Kiriyama was in the same class selected for this game of death. He was the main antagonist.
Trivia: Since Drew, Cameron and Lucy are all anti gun, they went through the entire movie using alternatives to guns.
Trivia: The filmmakers originally had an ending in which Alex grabs the cable that lies on Clear's car, Alex catches fire and dies. Then Clear gets her baby and Carter survives. The test audience didn't like this, so the filmmakers shot another ending in which Alex is decapitated by a crashing police helicopter. But again, the test audience didn't like the fact that Alex dies, so they shot the finish with the billboard, which took 6 days to film and cost nearly $2,000,000.
Trivia: Right at the end, in fact the very last frame, you can see a face in the snow as the shot fades out.
Trivia: 13 Mustangs from 1967-1968 were modified to be "Eleanor" in the movie. One was a True Shelby GT500, but this was used by Bruckheimer as a reference piece and used by him personally. The rest were run of the mill Mustangs modified with bodykits and other goodies. One was chopped up to film certain sequences (in car shots, etc.), 2 were destroyed, and the other Mustangs were modified to perform certain tasks (Chases, Jumps, etc.).
Trivia: When Maurice is looking for Trish outside the CD store, you can hear him say, "I'm gonna find your Aaliyah lookin ass." Trish is played by Aaliyah.
Trivia: A scene in which Sebastian brutally and graphically rapes his neighbor was filmed, but was mostly deleted as test-audiences felt it made Sebastian far too evil. And thus, the version of the scene in the theatrical cut only alludes to the idea without directly showing it. The original scene was reinstated in the director's cut released on DVD and Blu-Ray however.
Trivia: Not a mistake, but a little extra. When we first see Doug the Head in the bar drinking and getting his lunch, the man on the right, reading the newspaper is director Guy Ritchie.
Trivia: In the scene where Lenny is on the phone describing how Sammy Jenkis ends up in a home due to the death of his wife, it shows Sammy sitting in a chair looking towards the camera. Sammy is temporarily blocked from our view by someone walking in front of him. As the person passes by, it is not Sammy that re-appears, but Lenny. To see it well, you will have to use the frame-by-frame mode. There are about 5 visible frames of Lenny in the home, and then it cuts back to him inside the motel room talking on the phone again. (01:29:55)
Trivia: When Buck is live on air, there is a guy saying "That's our Buck". This is a cameo of the singer/songwriter Bob Carlisle, famous for his song 'Butterfly Kisses'.
Trivia: The candy factory name, Jolly Jack, is a tribute to "Jolly" Jack Kirby, a legendary comic book artist and writer.
Trivia: Director Mathieu Kassovitz has two cameo appearances in the film, one as the hooded killer in the doctor's house who shoots at Jean Reno and another as the voice over the CB talking about the Lada car to Vincent Cassel. He was also supposed to have played the role of a policeman in this film but the character was dropped.
Trivia: When Nyah is trying to convince Ethan to shoot her, she says "Do it. Now!" There is still about forty minutes left in the movie, but those are the last words she says.