Continuity mistake: In the hotel scene when Van Damme is crashing through walls to escape the other Universal Soldiers who are shooting from outside, one shot from the inside of the room shows him hitting the wall with his left shoulder, but when the camera goes into the next room to show him coming through that wall, he is breaking through with his right shoulder. (00:39:35)
Continuity mistake: When Luc Deveraux and Veronica Roberts are on the prison bus and Andrew Scott is chasing them on the truck/base of operations Andrew starts throwing hand grenades. Andrew throws one that lands inside the bus. Veronica has time to fumble around for it, pick it up, scream about it and throw it out of the window before it explodes. The rest of the grenades that Andrew throws explode in a couple of seconds like they are supposed to. (01:17:20)
Other mistake: When Dolph Lundren shoots his boss he shoots him through his glasses in his eye. However the guys lens never breaks. His glasses fill up from the inside with blood. (00:52:50)
Continuity mistake: In one scene JCVD is trapped in the back of an out of control prison bus. The driver has been killed but has, one must assume, died with his foot jammed on the pedal because the bus doesn't slow. In a shot facing back at the bus you can clearly see a pair of hands steering the bus. (01:16:35)
Audio problem: When Jean Claude and the girl are in the bus while Dolph is throwing hand grenades, they say a few lines as their bus is getting rammed. There are 3 lines in a row where what they say is not what is heard. 2 lines by the woman and 1 line by Van Damme. (01:16:15)
Continuity mistake: When the Unisols first show up at the dam, the colonel is wearing a 11th armored cav patch on his left sleeve and a Special Forces patch on the right. In the next shot he is wearing a 11th cav patch and no SF patch, then a SF patch on the left sleeve and nothing on the right, then they switch (SF on the left and 11th cav on the right). This continues throughout the movie.
Revealing mistake: As Luc and the girl escape the motel, they drive through several windows. On the last one, you can see a (very) badly placed ramp for the stunt. (00:41:50)
Deliberate mistake: At the start of the movie when the articulated truck is leaving the aircraft, you never see the attached trailer until the truck is completely flat on the runway. This is because of the steepness of the loading ramp, the trailer would ground and get stuck on the ramp.
Continuity mistake: After the big chase scene with Luc and Veronica in the prison bus, and Sgt Scott has seemingly been killed, Luc and Veronica knock out the Sheriff and take his car. The car they take is a white car with blue lines on the side, the word "Sheriff" stencilled on the back wing and large flashing lights on top. In the next scene when they arrive at Luc's family's home, the car is still white with blue lines, but has no lights on top or writing on the wings, and has a totally different bumper on the front. (01:18:20)