According to tour guides at Dublin Castle in Ireland, Jackie Chan hopped onto the throne during filming. This made him the first person to sit on the throne since King George V.
After seeing credited director Gordon Chan's rough cut, Columbia Pictures hired Doug Aarniokoski to shoot new sequences, and re-edited the film extensively.
This is the first movie in which Jackie Chan uses special effects for his fighting.
The effect of showing the shadows when Eddie (Jackie Chan) is beating up a thug in the sewer early in the movie, was also used in Enter The Dragon (1973), which also featured Jackie Chan and Sammo Kam-Bo Hung.
Julian Sands (Snakehead) also voiced the character "Valmont" (head of "The Dark Hand") in the animated series Jackie Chan Adventures (2000).