Deliberate mistake: When Braden confronts Cho on the rooftop, he uses dummies of himself to throw his opponent off-balance. But how could he have brought the bulky dummies onto the roof without being in the first place, or without proper preparation?
Plot hole: To murder Chifano's informant, Braden uses a throwing star. But there is one thing which makes this scene illogical: Braden is evidently not in his civilian suit, but in his ninja costume (the ninja suit's armsleeve is definetly on his arm). But since Chifano and the informant are looking in the same direction when the throwing star hits, and since a ninja costume would make Braden stick out like a sore thumb, it is VERY impropable that he'd escape the scene just like that.
Suggested correction: Throughout the movie Braden (as a ninja) has many instances where someone close up was distracted for only a second, only to look back and see he'd disappeared. This is especially true in the final rooftop fight with Cho. So it would be possible for him to be undetected from a distance in the scene where you're talking about. I also just watched this scene, and Cifano and his men are NOT looking in the direction of the informant but about to enter a vehicle when the star hits. They turn around and see him fall into the fountain. It makes sense that they wouldn't see Braden.
Continuity mistake: The Masked Ninja (Braden) carries a lot of weapons which keep appearing and disappearing whilst he inflitrates Chifano's building; his spear-stick and a throwing axe (both relatively big - and therefore visible - weapons), for example, are both there whenever he needs them.
Continuity mistake: When Dave dies Cho is beside him squatting, but in the next shot he is standing up.
Continuity mistake: During the alley fight scene, the Indian hits Cho over the head with a crate then picks him up with both hands. In the next shot, the Indian suddenly is holding a knife.
Continuity mistake: Just before Cho drop-kicks the van's windshield, the Indian is sticking his head out of the window. In the next shot, the Indian's head is no longer sticking out.
Continuity mistake: During the park battle scene where Cho uses fans to fight the cowboy thug, the cowboy's sunglasses appear and disappear between shots.
Continuity mistake: When Cho jumps onto the roof of the van, the driver changes position from left to right. The shot was mirrored.
Continuity mistake: When Cho catches up to the van by jumping on the roof of a parked car, his pose changes between shots.
Continuity mistake: When Cho chases the van, he grabs on to one of its ladder steps. In the close-up, he's holding on by the ladder bars.
Continuity mistake: As Cho chases one of the thieves up the stairs, another thief grabs his leg. In the close-up, the thief is not grabbing his leg.
Continuity mistake: During the alley fight scene, Cho roundhouse kicks one of the thieves up close. In the next shot, the thief runs up stairs and Cho chases him. They are now far apart.
Factual error: At the time when Cathy and Kane get to Chifano's building with the police they would never be allowed to get inside before the police.
Continuity mistake: When Cho is fighting Braden and falls from the roof top he stops using a hook. When he steps on the top again besides him is the exit door, but when he makes a step forward he is now inside the concrete square.
Continuity mistake: After Kane saves Cathy from the jacuzzi they call the police, but Cathy could not dry herself in just a few moments.
Continuity mistake: After Braden kills Cho's mother, Kane sees him from the roof and he puts his hood and mask on with no time to do it, just in a few seconds.
Continuity mistake: Before Cho and Dave confront the thugs in the park, the gray sweater of Dave is unzipped then zipped and back again between shots.
Continuity mistake: When Cho and Dave confront the thugs in the park, the guy in jeans and boots is lying on the table, but he is standing in the next shot.
Continuity mistake: After his fight with the Indian and the others Cho gets some wounds on his face which disappear later at the funeral of his grandmother.
Continuity mistake: When Cho is on the roof of the van, his clothes are clean. When he smashes through the windshield, he suddenly has wounds.
