The film was the first time that the authentic voice of Jackie Chan was heard in a motion picture. All of Chan's prior Hong Kong films had featured traditional dubbing of his voice for both Cantonese and Mandarin releases. As a matter of fact, he wouldn't dub his own voice in a Hong Kong feature before Supercop (1992).
In his autobiography "I Am Jackie Chan: My Life in Action", there was one scene in the production in which Robert Clouse is not interested in Chan's idea which is to flip out of the car and had wanted him to just walk from the car to his father restaurant. Chan quote's "No one will pay money to see Jackie Chan walk!" The reason he believes this film failed was because he wasn't given a chance to direct the action scenes the way he wanted them for the film.