Revealing mistake: During the ambush scene at the beginning of the film when the ninjas are sent after Armstrong and Patricia, an American casualty can be seen getting up while he is supposed to be dead. (00:10:35)
Continuity mistake: After the heels get broken off Patricia's shoes by Joe during their escape from the ambush, the shoes in Patricia's hands when they come out of the water are entirely different flat shoes, with a flat sole and no angle that the original high heel stilettos had. (00:12:50 - 00:14:30)
Continuity mistake: When Jackson's sitting on his motorcycle talking with Joe he points up with his right hand, which switches to being his left hand in the following shot. (00:34:00)
Continuity mistake: During the first 20 minutes of the movie, Patricia is wearing a pearl necklace. When she is shown sitting in the car, it is a double string of pearls. After she has crashed the car and climbs out, it is a single string of pearls. When she and Joe are running through the jungle, it is once again a double string, and when she returns home it is a single string again. This can not be explained by the necklace being a long string of pearls that's draped twice around her neck, as the necklace is always shown to reach just below her throat, and a longer string would reach further down.
Continuity mistake: Near the end of the film when the black star ninja and the yank ninja are fighting, they come to a wall with rope hanging down and start to climb.When the camera switches back and forth, you can see that they have both chosen the same rope (they both climb on the rope marked "Gin") even though they are side by side when they climb.
Revealing mistake: During the Army assault on Ortega's compound, Jackson is shown as he uses a machine gun to clear a long balcony of enemies. The third person he kills here is hit several times, but does not fall over the railing. Instead he slowly and carefully climbs over it, lifting one leg over at a time.
Continuity mistake: At the start of the movie when the Army convoy gets attacked, the woman goes to escape in the green car. The back wheel has no hubcap, but when it cuts back to the car after it's been shot, a hubcap is now on the wheel.
Revealing mistake: As Joe jumps over the wall with the motorcycle, you can see that it's a stuntman performing the actual jump. His hair is longer and darker than Michael Dudikoff's.
Continuity mistake: At the ambush, a gunman shoots the left rear tyre. Next cut the tyre is undamaged.
Plot hole: When Dudikoff gets Ninja training from the old gardener before his final confrontation with Black Star Ninja, the gardener says "The time has come for your final lesson" and then introduces him to the throwing star and the ninja sword. If this is the final lesson and he's only being introduced to these weapons now, how come Dudikoff used these weapons successfully earlier, against about 15 ninjas in the fight at the warehouse trap?
Suggested correction: The lesson was the use of "ninja magic" symbols, not the weaponry.
