Trivia

Jackie Chan's displeasure with the way this production went, would lead to him shooting his own Police movie Police Story (1985) to much success.

Golden Harvest hired Director James Glickenhaus after his success with movies such as The Exterminator (1980), but rifts began to surface between Glickenhaus and Jackie Chan and his team during shooting. This would lead to Chan re-shooting sections of the movie for an alternate Asian release version of the movie.

The U.S. version is the first Jackie Chan movie to feature the word "fuck."

The Hong Kong version of the movie cut much of the random nudity from the U.S version, and toned down certain gore elements, while adding more martial arts action including major re-shoots and re-edits of the final fight scene, plus a whole new subplot featuring Sally Yeh from The Killer (1989), and an additional fight scene that has Bill Wallace fighting veteran Shaw Brother's villain Hoi-shan Lee on the Hong Kong waterfront.

The Police Story film franchise was initially born out of spite from Jackie Chan's displeasure at how this movie turned out. Ironically, it was in this movie that Jackie's character, Billy Wong, was referred to as "Supercop" by his superior. This, in turn, ended up being the subtitle (and in the case of the U.S. release, the main title) of the third movie in the Police Story film franchise.