Detective Nick's messy apartment is located at 1158-1170 Montgomery Street.
Kim Basinger, Emma Thompson, Michelle Pfeiffer, Greta Scarch, Julia Roberts, Meg Ryan have all refused to play the role of Catherine, and the director chose Sharon Stone The role was played because he watched "Universal Veyron" in 1990, in which Sharon Stone played an evil role pretending to be innocent.
Former professional racing driver Mike Douglas drove his car in the film to perform a stunt in the scene of a car crash.
In order to make the film rated as R, director Paul Van Hoeven re-edited the film 14 times.
Fifty riot police from the San Francisco Police Department patrolled the filming scene every day to prevent radical homosexuals from launching excessive acts against the film crew.
When filming a murder scene, a medical staff is on standby at any time to prevent Sharon Stone from fainting due to the bloody performance. This scene later became a nightmare for the medical staff.
