Other mistake: Lakella seems to disappear from the movie after the battle.
Other mistake: During the fight on the dam between von Ragnar and Lance, the protective cover of von Ragnar's deadly middle finger nail is never seen until the closeup shot of von Ragnar removing it.
Other mistake: Walter Paisley is cleaning the floor and encounters the first robot. The whole reason the robots are patrolling at this point is that the shopping centre is supposedly closed to customers, as it is nighttime. However in this scene you can see quite a few people shopping on the upper tier of the mall above Paisley.
Other mistake: In the scene following the piano debacle Paul Reiser's image is reversed so his name tag is on the wrong side and backwards.
Other mistake: As the plane is beginning to crash, Chuck grabs the watch with his girlfriend's photo in it, and somehow it survives everything, but how? He had the watch in his hand, but in many shots we can see Chuck with both hands open as he needs them to hold onto something. He didn't put it in his pocket, he didn't have time.
Other mistake: Taylor parks his car in Cuesta Verde, next to a couple of crates next to the pilot's door. He steps down and walks straight without looking down, which is impossible for he should have tripped.
Other mistake: When Turnip runs off with a horse suppository up his hindquarters, the policemen shoot at him being all in a straight line with each other - in fact it really looks like they should be shooting at each other if those guns were real. (01:05:55)
Other mistake: Van Damme in the opening credits is presented quite literally as "Ivan, the Russian." During the movie they call him Ivan and is last name in the tournament is mentioned by the announcer as "Krasinki." So naturally in the end credits roll Van Damme is billed as... Karl Brezdin. Close.
Other mistake: The spot light from the school building spotted the scuba divers with yellow oxygen packs, but the guerrillas did not respond.
Other mistake: The Jackson High Cougars goat mascot that McGrath must return is played by two different goats; note the goat's distinctive horns change, and its bell collar is buckled the opposite way.
Other mistake: Harry Shannon tells Mark Kaminsky that the alias he is giving him is that of Joseph P Brenner which to a guy with a long rap sheet. Paulo Rocca later asks Joey, "how the hell is it you never did any time?" (00:20:56 - 00:39:53)
Other mistake: When examining the craft in the hangar, it's reported there are no seams or any way in or out, but when the camera focuses on the man's hand, you can see the seam where the hatchway will be.