Irreversible

The first thirty minutes of the film has a background sound with a low frequency of 27 Hz which is almost infrasonic (this sounds like a rumble/vibration), similar types of noises are at times used by police to stop riots. According to Gaspar himself, this could only be heard in theaters (which usually have huge sound systems/subwoofers) and not from headphones or regular home theaters. In humans, this noise causes nausea, sickness, and vertigo. It was one of the reasons people walked out of screenings during the first part of the film. In fact, it was added by Thomas Bangalter (from the electronic music group Daft Punk) to get this reaction.

At the party Vincent Cassel gives his characters name as "Vincent" instead of "Marcus." He quickly covers his mistake and saves the scene.

As would be expected of a film that runs backwards, the "end credits" appear at the beginning of the film and scroll in reverse. There are no credits or studio logos at the end of the film, only the title card "Le temps détruit tout" ("Time destroys everything").

A new version, called "Irréversible - Inversion Intégrale" ("Irréversible - Straight Cut" in English), was screened in 2019 at the 76th annual Venice International Film Festival. It has been recut to put the narration in chronological order.

Featured in Zomergasten: Episode #18.6 (2005)