At 56 minutes, Jimmy Wang Yu (Jimmy Wang Yu) climbs through a window that has a vertical opening when shot from outside as he enters the window. When shot from inside as he comes inside, the window has a horizontal opening.
During the opening sequence, the shade and thickness of Sammo's mustache changes a few times.
When Bob Taylor is questioning the character played by Sammo Hung, he says he is from the Federal Narcotics Bureau. Australia has never had such an agency.