Irreversi is a 2010 dramatic film directed by Michael Gleissner and shot in Hong Kong as the English language version of Gleissner's Mandarin-language film Hui lu, which he filmed and directed at the same time in the same locations but with an entirely different cast. The title refers to how a situation can reverse and turn against the original perpetrator.
Both Irreversi and Hui lu were self-financed by Gleissner, and filming of both began in Hong Kong in March 2006. The film duo marked being Gleissner's directorial debut, as well as being the first time identical films were produced simultaneously in both English and Mandarin, with the two otherwise identical versions having two separate sets of cast and crew. The only cast that was common to both films were Vietnamese supermodel Bebe Pham and Geissner himself using the pseudonym of Ken Arden. Gleissner directed both