Filming in Vancouver, Canada on 6 October 1994, Jackie Chan broke his right ankle while attempting the scene where he jumps onto the hovercraft. Despite the injury, he was present at the premiere of The Legend of Drunken Master (1994) at the Vancouver International Film Festival that night. Later in the production, Stanley Tong sprained his ankle, completing the film on crutches. Françoise Yip also broke her leg while filming the scene where she rides a motorbike across the tops of parked cars. She insisted on returning to the set after her leg was plastered at hospital. Two stunt women also broke their legs during the filming of the motorcycle chase.
The script called for a leap from the top of a parking lot to a fire escape on the floor below on the building across the street. As is his custom, director Stanley Tong attempted the stunt before asking any actors to do so. He tried it with the help of a cable harness, but quickly decided it would be safer without the harness. The landing point was not visible from the point where the jump began, so tape was placed on the take-off point as a guide. The jump was completed perfectly by Jackie Chan on the first attempt, doing his own stunts as is his custom. The jump was captured by four cameras.
The original spoken dialogue consisted of all of the actors speaking their native language most of the time. In the completely undubbed soundtrack, available on the Warner Japanese R2 DVD release, Jackie Chan actually speaks his native Cantonese while Françoise Yip and Morgan Lam (the actors playing Nancy and Danny) speak English. All of the original dialogue was intended to be dubbed over in the international and Hong Kong film markets, and New Line cinema overdubbed and slightly changed the original English dialogue.
In his autobiography, I am Jackie Chan: My life in Action, Jackie Chan talked about the initial difficulty of filming a movie in Vancouver that is set in New York. The production team initially had to put up fake graffiti during the day and take it all down during the evening, while simultaneously making sure that no mountains made it into the background. However, Chan decided that it was best that the production team focus on the action only without worrying too much about scenery. Viewers have noted mountains in the background, which doesn't exist in the NYC landscape.
A rumble in federal court is in the works. New Line Cinema has sued Miramax Film Corp., charging that Miramax is planning to break a pact to stagger the releases of each company's competing films starring martial arts star Jackie Chan. New Line and Miramax separately acquired the domestic distribution rights to a number of old and new Chan movies and, according to the suit, the companies agreed last year to space out the releases of the films - as well as other movies that might attract the same young male audience. The suit claims Miramax plans to break the agreement by releasing an unidentified Chan movie (Police Story 3: Supercop (1992)) in July 1996 at the same time New Line will open its big-budget action movie "Rumble In The Bronx"