Factual error: The cap badge worn by Captain Halliday of the RAMC is the Queen's crown version, which didn't come in to use until the 1950's. It is also made of brass, when it should be in a bronzed finish for officers.
Character mistake: When Bonnie cuffs her first arrest she mistakenly cuffs the guy in front instead of cuffing his hands behind his back.
Other mistake: In the exterior shot of the Grandeur Hotel, it's a poorly made building prop and its name is misspelled "GRANEDUR." (00:18:00)
Visible crew/equipment: Whilst the group of Southeast Asian men are walking through the hair salon, there is a shot that starts with a male hairdresser wafting a blanket, that pans over to the group of men and then the camera rotates around the man holding a little girl. Immediately after the camera passes the man and girl, the camera very briefly holds on another man waving to an employee. Just as this happens, the reflection of the cameraman can be seen in the mirror to the left of the shot. (00:31:30)
Factual error: Set in 1955, Tom Holman enters a construction site with an orange warning sign. Prior to 1971, construction signs were yellow.
Other mistake: There are pictures of 4 year old Isaiah on Margaret's desk in her office at a point in the movie when he was still a newborn. (00:15:59)
Revealing mistake: During the final fight, Takeda is chained up between two ninja, and Kinjo orders them to kill him. One of them raises his sword, but is shot by Takedas wife. As the arrow hits, the film noticably "jumps", as the actor is replaced by another with an arrow attached to his throat. Not only does his position (especially his head) slightly change in an instant, but his suit also suddenly becomes a lot darker, and a crease appears in his hood.
Continuity mistake: Joan Crawford said that when she gets nervous, her right foot - due to an accident as a child - slips out of her shoe. But later on, it's her left foot now that causes it to slip out of her shoe.
Factual error: Calamity Jane was not Pecos Bills love interest. According to legend Pecos Bill was married to Slue Foot Sue another tall tale. Whereas Calamity Jane was an actual historic figure.
Character mistake: While sitting on the bed, Darkly relays the story of how he got his name, saying it comes from 2 Corinthians 13:12. It, in fact, comes from 1 Corinthians 13:12. (00:10:55)
Revealing mistake: When Dwight is falling down the stairs, you can easily tell that it's a (much older) stuntman.
Revealing mistake: Obvious stunt double for Susan Lucci in the skinny dipping pool scene. The stunt double's hair is longer and straight while Susan's goes past her shoulders only some, has bangs and is slightly curled.
Continuity mistake: Susan Lucci's hair color goes back and forth from reddish brown to black in several scenes.
Continuity mistake: The Black Scorpion's boots constantly change from heeled to flats.
Revealing mistake: When Annie's boyfriend is killed, she runs over to Candyman and scratches his face open and bees pour out. You can easily see the head is a prop.
Visible crew/equipment: The demolition crew can be seen on the driver's side window when Sonny Chiba and Brigitte Nielson's characters are fleeing the scene of a blown up car. The shot has Robert Davi's character chasing after them and then hearing the explosion behind him. You can see a crew person sitting and about four others kneeling, trying to evade cameras. This happens in scene 6 at 52.01 minutes into the movie. (00:52:00)