· 1. There is a scene in the film where the hero Leonardo passes by a comic shop. We can clearly see a Batman logo on the window of the store. Later, Christopher Nolan directed "Batman: Hour of War", "Batman 2: The Dark Knight" and "Batman 3: The Dark Knight Rises".
· 2. Before Kerry-Ann Moss was determined to play Natalie, movie stars Ashley Judd, Famke Jensen and Angelina Jolie were all considered objects.
·3. When filming the scene where Leonardo kills Jimmy, Jimmy's actor Larry Holden told Guy Pierce that for the effect to be realistic, he must be beaten. Pierce, the bodybuilding enthusiast, followed Holden's advice. The consequences can be imagined. After filming this scene, Holden was bruised.
4. Before Guy Pierce got the role of Leonardo, movie stars Alan Eckhart, Brad Pitt, Charlie Sheen and Thomas Jane were all on the shortlist.
5. The tattoo shop that appears in the film is named after Emma Thomas. Emma is the wife of director Christopher Nolan and she is also one of the co-producers of the film.
6. Director Christopher Nolan’s Honda Civic also appeared in this film, parked outside the motel next to the protagonist Leonardo Shelby’s Jaguar.
7. Christopher Nolan’s script is based on his younger brother Jonathan Nolan’s novel "Death Warning". Since the novel was published after the filming was completed, the script is still considered to be Christopher Nolan’s original.
8. The filming takes only 25 days.
