I don't know if there has ever been a more difficult film for me to sit through than this one. Gaspar Noé's Irreversible (2002) gave me both a nightmare and an existential crisis. Viewed in reverse-chronological order, this film will leave you upset with yourself for having watched it and proud that you made it to the very end.   SOURCES/MORE INFORMATION IMDB: https://m.imdb.com/title/tt0290673/ Mephistopheles: https://en.wikipedia.org/wiki/Mephistopheles  An Experiment with Time: https://en.wikipedia.org/wiki/An_Experiment_with_Time  IndieWire Interview: https://www.indiewire.com/features/general/why-gaspar-noe-directed-on-cocaine-masturbated-in-his-own-film-and-shot-a-live-birth-55975/  Article from The Guardian: https://www.theguardian.com/film/2002/aug/02/artsfeatures.festivals  Laws of Thermodynamics: https://en.wikipedia.org/wiki/Laws_of_thermodynamics