Continuity mistake: At the beginning of the movie, Tom Stillwell is shouting instructions at the class. He calls for a stop with his hands behind his back, and the class turns and stands by as he looks...with his hands on his hips. In the reverse shot his arms are down. (00:01:50)
Continuity mistake: Sensei Tom Stillwell realises the threat from the bad guys being all evil in his dojo and jumps back yelling "This will solve nothin'." Before it cuts to a new view, he is looking away from the guy in a suit and looking at the others, but in the next shot he's still looking at the guy and only then checks Van Damme and the bearded dude out. (00:04:40)
Continuity mistake: Van Damme sprints when his buddy is forced to kneel before Stillwell; the problem with the cool sequence when he springboards off his back is that Stillwell in the shot when Goatee Guy went down had already regained his balance, while in this new action shot his leg is still raised. (00:05:30)
Continuity mistake: Jason grabs from the cart a Canada Dry box with a basketball and some blue plastic stuff on top, and brings it to the garage. He then goes back to the cart, and meets his future best buddy R.J. Madison as he...grabs from the cart a box with a basketball and some blue plastic stuff on top. (00:09:35 - 00:10:30)
Continuity mistake: Jason wants to see the garage right away, knowing he's gonna set up some cool stuff there. He brings his basketball in front of the garage door. Between that shot and the one where he opens it, the natural light has completely changed; the house is not casting a large shadow behind him, the tree is, and his own shadow moved to the opposite side. (00:09:50)
Continuity mistake: Setting up the garage, Jason picks from his box a punching ball. Notice the sticks on the right side of the box. And how when he Tarzans into the shelves a moment later the sticks have changed position. (00:10:00)
Continuity mistake: Just when Jason gets to Seattle and is playing with the punch bag, 3 wood pieces fall to the floor, then Jason sets one in it's place but in the next shot the one in the middle is back in place by itself. (00:10:20)
Continuity mistake: Jason drops the basketball he was carrying. There's a mat on the door of the trailer; when Jason picks up the ball the new kid bounced back to him, the mat is folded differently. (00:10:35)
Continuity mistake: When RJ stops his boombox in front of Jason, the fact that the two shots were filmed in separate moments is obvious; they are now at greater distance and RJ does not cast his shadow on Bruce Lee anymore. (00:10:55)
Continuity mistake: When Rafer Jason Madison III asks Jason if they just moved in, eliciting a humorous response, he has two hands on the same (left) handle, switching to both hands at the cut. (00:11:10)
Continuity mistake: RJ offers to show Jason what he can do instead of wooden dummy sparring. Jason looks at him busting moves as he leans against the dummy with both arms, but in the first shot he had only the right arm in position. (00:12:30)
Continuity mistake: RJ in the garage is doing his thing 'rapping' and doing whatever passed for music in the 80s. Part of the scene must have been left on the editing room floor, because after the close-up on his legs doing the moonwalking-y act he is about 1 meters away from the previous spot, under a different light, mounts on a box that had books on that corner (they are pushed back now), and even falls down on a bamboo mat that was not there before. (00:12:50)
Continuity mistake: When RJ falls off the shelves that Jason hastily put back in place earlier, the kid is climbing on different set of shelves; he approaches those closest to the window, but falls from some that are in the middle of the case. (00:13:00)
Continuity mistake: The protagonist is all hyped-up because of his planned cemeterial trip. He begins training in his garage; when he kicks both the punching bag and the speedball, or at least attempts to, the mats on the floor change position between shots. (00:15:00)
Continuity mistake: The obese comic relief is mocking his dad's speech as he puts him to work washing windows. At the first cut when he approaches the window you can tell time (and takes) passed, because the wet area on the wall under the window changed size considerably. The wall even basically all dries up the moment Scott spots RJ. (00:16:05)
Continuity mistake: Scott hoses RJ with the window cleaning machine; in the first shot RJ is really close to the fence, but the skateboard slips on sidewalk that is somehow already wet. Then Scott sits on him and begins brutalizing him, with the cement around RJ's head that is wet or dry depending on the shot, and when he gets up it's like they never fought with any water involved, the sidewalk is all dry. (00:16:35)
Continuity mistake: When Scott gets RJ with the pressure washer, he wets the left side of his shirt - but in the hijinks by the road constructions, RJ sports a T-shirt wet on his right side. (00:16:45)
Continuity mistake: RJ is skating away from an angry Scott he just bit. In the sequence with two construction workers and a ladder, the natural light changes completely between shots (no direct sunlight at the beginning, clear shadows and sunny area in the close-up of the board tricks). (00:16:55)
Continuity mistake: Scott wets only a small part of RJ's shirt with the hose, but when he gets to Jason's place the whole shirt is wet. (00:17:50)
Continuity mistake: Scott begins scarfing the burgers; instantly he gets a bunch of mayo and ketchup on his thumb, but it's gone at the cut. (00:20:10)
