Continuity mistake: The male protagonist acts sassy about the Christine not liking cops and pulls over. His hand in the next shot is on top of the steering wheel, and in the first one it wasn't. (00:25:41)
Revealing mistake: Christie is fighting the dudes hanging out in the alley of the gym. She knocks down the first two, then she does a weird move with her feet on the third one. The cooperation from the stuntman is blatant there. (00:24:15)
Continuity mistake: When Christie's friend checks out the katana, she is suddenly leaning with her right arm against the railing at the cut. (00:20:20)
Continuity mistake: The first time we meet Christie, she is climbing a telephone pole for her job. She secures the position, and we get close-ups of the actress. She then begins her work using the box that appeared in front of her during those close-ups, because there was no such box in the first view of the pole. (00:13:20)
Continuity mistake: The Black Ninja throws the smoke bomb and vanishes. The cops witness the scene in disbelief. The fat and balding one, called Case, removes his glasses and hat with a single movement. He's still wearing them in the wider angle, though. (00:12:05)
Continuity mistake: When the Black Ninja in Green seemingly dies (first time of many), the extras are in wildly different positions between shots. Just as an example, in the second shot there's suddenly one dude on one knee on the hood of the car that wasn't there before. (00:11:15)
Continuity mistake: After chilling in the pond a while, the ninja resumes killing cops left and right. He does not hit one with his katana (but he dies anyway), then he turns around to throw a shuriken at another; this new guy before the camera cuts away is simply raising his empty hands to die, but in close-up he's being more menacing, since he's aiming the gun. (00:10:25)
Continuity mistake: The ninja kills the idiotic policeman who went in really close to check out the reed in the pond, and then runs away. He is as you'd expect completely soaked in water, but at the next cut he's totally dry. (00:10:10)
Continuity mistake: When the second cop on a motorcycle falls into the lake, the stuntman deserves good cards from the judges for his dive, but in an earlier shot the ninja had already knocked him off the bike, into the dirt. (00:07:25)
Continuity mistake: The police car that crashes into the lake has a perfectly intact roof; its roof was previously shot through, stabbed and punched through. (00:07:20)
Audio problem: The first motorbike cop killed by the ninja screams in agony with his mouth properly closed. (00:07:05)
Continuity mistake: When the cops try to kill the ninja blasting through the patrol car roof with the shotgun, the officer's hands swap position between shots. (00:06:50)
Revealing mistake: Police cars get to the golf course, where the ninja somehow is still hanging out in the open. The footage of the car doing a U turn beginning to chase him is sped-up to Benny Hill levels. (00:06:00)
Continuity mistake: The guards of the golf course arrive to the crime scene and approach the corpse. One of them grabs his radio and calls the cops. He's by the corpse of the attractive partner of the main victim; look closely and, without wanting to paint any intent in his action, he ends up with a handful of the actress' bare thigh. In the next shot he's talking on the radio with a firm grip on a more sensible limb; her arm. (00:05:25)
Continuity mistake: When the ninja shows his super-strength by lifting the golf cart, his left-hand keeps changing position at the back of the vehicle. (00:04:40)
Revealing mistake: The evil ninja blows a dart inside the barrel of a gun making it explode when the bodyguard fires. Forgetting the fact that the movement is unnatural and patently phony since the film is reversed, the dart also fully 'disappears' inside the gun and yet again when we see the guy about to shoot there's an inch-long of dart sticking out of the gun. (00:04:20)
Continuity mistake: Throughout the whole first fight scene the natural light is obviously different between shots. It is already noticeable at the very beginning when the golfer stands by the cart with much more sun on him in close-ups, but also even more obvious when the ninja downs the first opponent that falls in the shade but is lying fully in the sun as his partner assaults the not-so-elusive killer. (00:03:30)
Continuity mistake: The ninja suits up during the opening credits; he reaches inside the weapon stash with his left hand to pick the shurikens, but in the following shot he draws back his right hand. (00:02:40)
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)
Other mistake: When the ninja slices at point-blank the obese cop in the pool room, the make-up used is a single strip of blood. Obviously they wouldn't show a graphic dismemberment or decapitation, but the man here practically dies from a cut on the cheek. Men do more harm to themselves shaving. (00:38:50)
