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: On the audio commentary of this film, director Kassovitz refers to the two actors playing the Sarzac policemen as 'Kepi" and 'Vomi' respectively ~ the latter nickname was bestowed on the unfortunate actor who was sick throughout his scenes in the film.
Trivia: Although they have no scenes together, this is the first film in which Vincent Cassel (Max) and his father Jean Pierre Cassel (Dr Cherneze) appear together.
Trivia: The producer of Mathieu Kassovitz's earlier film "La Haine", Christophe Rossignon, appears in a cameo as a baffled policeman towards the end of this film.
