Other mistake: When Rambo gets killed, the lethal shell comes out of the right barrel, but in the earlier close-up on the villain gloating after maiming Rambo's legs, the right barrel was the one that already fired, smoke coming out of it. (00:32:40)
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: 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: 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: 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: 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: 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: Lakella seems to disappear from the movie after the battle.
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.