Trivia: When Danny DeVito is on the payphone in Hawaii the cab he's standing next to is from the Sunshine Cab Co. from "Taxi", where he played Louie the dispatcher.
Trivia: Mel Gibson references the Three Stooges several times in the film. In real life, Gibson is a big Stooges fan, and in 2000, he produced the biographical TV movie "The Three Stooges."
Trivia: Andy Garcia was originally brought in to read for Frank Nitti, but he asked if he could play George Stone instead.
Trivia: In the scene where Foley first visits Rosewood's apartment, he at some point pauses and looks at a poster of Sylvester Stallone from the movie "Cobra" (1986). Stallone was originally supposed to star in Beverly Hills Cop (the first one) as Axel Foley (or his name was going to be Axel "The Cobra" Cobretti). The script was changed for Eddie Murphy, removing a large amount of the action sequences from the movie. Many of those sequences were later used in "Cobra." The shot of Foley looking at the poster is a reference to this fact.
Trivia: Richard Dreyfuss and Emilio Estevez were having a movie trivia contest on the set one day. Estevez asked Dreyfuss to identify the movie that the line "This is no boating accident" was from. Dreyfuss didn't recognize the quote, despite the fact that he was the actor who said it in Jaws (1975). Deciding that this was too good to pass up, this incident was re-enacted for the film.
Trivia: In several scenes where H.I. is in the factory where he works his work suit has a "Hudsucker Industries" patch on it. The Cohen brothers who directed and produced the movie also put out a movie a few years back called "The Hudsucker Proxy."
Trivia: The filmmakers used two different shopping malls for the scene where the doctor injects Tuck into Jack's rear. The opening scenes where the doctor runs in and heads for the elevator were shot in the Northridge Mall in the San Fernando Valley in Los Angeles. The scene where he reaches the top and rams the syringe into Jack was filmed on the top floor of the Sherman Oaks Galleria, another mall several miles away.
Trivia: Jackie Chan hadn't originally planned on making a sequel to "Project A." However, the Japanese Emperor personally told him he was a fan of the first film and wanted to see a sequel, leading Chan to decide to make this film.