Adult film star Ron Jeremy was not originally supposed to be in the porn actors strike in the film. He had assumed that the directors merely forgot to call him and showed up on set. As a result, all of his dialogue was improvised
One of Corey Haim's final acting roles before his death on March 10, 2010, and also David Carradine's final acting roles before his death on June 3, 2009.
In the scene where Chelios runs into a mob of porn stars, the "extras" in the movie are real porn stars. One of the stars most recognizable is Jenna Haze, but Peter North, Lexington Steele, and Ron Jeremy make an appearance as well.
In Cantonese, "Kaylo" is a slang term for a gay man.
Chester Bennington: The tattooed man Jason Statham rubs up against at the horse track is the lead singer for Linkin Park. He also appeared briefly in the original film as the guy in the hospital pharmacy who tells Chelios about the nasal spray. Bennington sadly died in July 2017 at the age of just 41.
Danny Lohner: The man accompanying the owner of the shock collar that Chev Chelios steals is Danny Lohner, of Nine Inch Nails and various other industrial projects.
Maynard James Keenan: The man with the control to the electric shock collar is the lead singer of prog-metal band Tool.