Revealing mistake: At the funeral, Ninja Christie shoots two arrows. She prepares to shoot a third, but meanwhile (in the shot where a widow is looking around worried and a man in a light suit pulls her away) another guy just dies for no reason hit by something invisible. (01:05:10)
Other mistake: Christie starts killing people at the funeral, and those in attendance start running away. When it shows a couple hiding behind a car, the woman is corpsing at best, the man is flat-out laughing. (01:05:15)
Revealing mistake: In the sequence with the ninja knocking two policemen off their bikes at the funeral, the one on the right goes down (not to dodge, but acting like he's being hit) a second before her foot actually hits. (01:05:40)
Continuity mistake: When the patrol car chases the ninja at the funeral shooting at her with a shotgun, there's a POV shot from the driver, who has his right hand at 12 o'clock on the wheel. Reverse angle and the hand is gone. It happens again moments later when the driver stops the car, and at the cut it switches from 10 to 2 o'clock with opposite hands. (01:05:50)
Revealing mistake: After the sequence where the cops eagerly arm themselves with batons (at the funeral of two dozen armed with guns), the ninja disposes of a single motorcyclist. As she knocks him off the bike, you can see on the path the dirt marks at the center of the asphalt from previous takes. (01:06:10)
Continuity mistake: When Ninja Christie fights a cop in a graveyard, the cop smashes a headstone with his baton. The damage on the headstone changes between shots. (01:06:25)
Continuity mistake: After one of his coworker smashed a gravestone with his baton, a second cop gets close enough to the ninja to grab his/her arm. The ninja punches him away with a blow from right to left, which is not in continuity with the previous shot. (01:06:35)
Audio problem: In the cemetery, Christie fights a cop who attacks her with a baton that makes a super-exaggerated 'swoosh' sound; exaggeration aside, the last 'swhoosh' happens during a motion with no speed, so the sonic boom there is not just overkill, it's wrong. (01:06:40)
Continuity mistake: When the ninja parries the baton strike from the guy making all the swooshing noise, her right side of the body (and her arm, specifically) are already prepared to hit the second guy while the left hand brings down the baton. The next shot though opens with her right arm low and her left arm high over her head. (01:06:45)
Continuity mistake: When Christie kicks a cop head-first into a gravestone shattering it (the gravestone, not the head, although one wonders how just the latter could happen), the stone breaks in two completely different ways in separate shots. (01:06:55)
Continuity mistake: In the opening phases of the fight between the two ninjas, the one possessing Christie tries to stab Yamada through a window. In close-up, Sho Kosugi has both hands on the brick sill, but in the next shot his left hand is still distant and closer to the doorframe. (01:08:20)
Continuity mistake: When Sho Kosugi breaks some boards that block the entrance to the house, the leftmost board is just chipped in close-up and fully broken in the following shot. (01:08:25)
Visible crew/equipment: Inside the house under construction, the Black Ninja drops a bunch of dirt from the top of the stairs (an action she will repeat later). The rubbish hits the camera that shifts slightly towards the end of the shot. (01:08:50)
Continuity mistake: When the Black Ninja drops a large wooden board on Yamada, Sho Kosugi's hands are positioned differently between shots, and when he breaks it, the two large pieces end up in different spots depending on the camera angle, even few seconds when the Black Ninja keeps going Donkey Kong on their opponent throwing more garbage at him. (01:09:35)
Continuity mistake: When the Black Ninja has been unmasked, somehow both warriors get scared by the cop sirens. Christie escapes through a window; in the first shot the window is half-opened, in the second, all of a sudden all she has to do is push the fly screen, as the window frame has been removed. (01:10:35)
Revealing mistake: When Christine escapes from the window, she turns into an athletic guy. (01:10:45)
Continuity mistake: The police arrives at the house under construction with three patrol cars. Watch as the cops get out of the cars and take position; their positions do change between shots - for instance, one cop stands behind the open passenger door of the car in front of him, and in the next shot he's still running towards it, and the guy behind the driver seat-side door of the other car points the gun with both hands first, then just one. (01:10:55)
Continuity mistake: During the close-up of Sho Kosugi looking languidly at Christie's boyfriend when the cops are taking him away, look at the blonde moustached cop behind him. His face is in the shade, and then suddenly in direct sunlight at the cut. Same for his fist as he holds the gun in this second shot; direct sunlight on it, shadow during the next close-up on the ninja. (01:11:25)
Continuity mistake: When the good ninja KOs the cops in the car, the hat on top of the last one is tipped in an entirely different way in close-up and wider angle. (01:13:10)
Continuity mistake: When Christie draws her sword and brings it down over her stalkerish boyfriend (but alas, doesn't kill him), he clings to the bedframe with both hands, but has just one arm raised in the second shot. You'd think the arm is down on the ground for good as shown in the room view too, but in the very last shot he's again gripping the frame. (01:15:25)
