Continuity: In the hockey game, the teams playing are the Los Angeles Kings and the Toronto Maple Leafs. You can notice the real logos when the camera is away from the action. When it gets closer, though (probably because of copyrights), the maple leaf is turned into a spades (from cards) with only "Toronto" written and the Kings' word and crown in the logo become just an "LA" with a slightly different shape.

Continuity: When the suspect is shot in the interrogation room, we can clearly see blood on the wall behind him. But when Riggs walks in and sees him, there's no blood visible.

Continuity: During the chase, an articulated lorry skids. If you look during one of the shots you can see that the trailer part is skidding over skid marks that already exist, obviously from previous takes.

Continuity: As the villains attempt to flee, they and Riggs drive onto a section of freeway that is being newly constructed. However there are already skid marks on the road surface, which is of course impossible, unless lots of people have screeched to a halt right at the edge of the freeway...

Continuity: In the underground scene, Riggs runs into the tunnel in trainers and come out wearing boots.

Factual error: The MAC-10 machine pistol used by Darryl and Sergeant Murtough is actually a MAC-11.

Continuity: The scene in the water after our two heroes have been fighting in the boat and Sheriff Dep. boat comes upon them: Notice Mel Gibson's forehead hair - up, down, up, down... and both their hands keeps changing grip on the boat.

Continuity: When Riggs is riding the motorcycle chasing the bad guys, the damage to the windscreen of the bike changes as the shot changes from close up to long shots and back. In the close-ups the windscreen is broken in half. In the long shots it is only cracked.

Visible crew/equipment: As the motorbike falls from the highway, just after it explodes there's a very short wide shot of the site with Danny Glover standing by his car and a couple of guys in hard hats standing around (or running for their life). If you look right behind Danny Glover you can see two people, one in a white hat, one in a red, and one of them is holding a camera - they start moving backwards just before the end of the shot. We then see the bike blowing up, then a close up shot of Danny Glover, from the camera we've just seen.

Continuity: When Riggs is following the villains' pickup truck, they make a left turn into a highway and a Delta plane is spotted landing. In the next shot, definitely showing the same turn (note the billboard in the background for "CBS FM" which is in the same place, etc.) the plane changes into an American Airlines plane - note the disappearance of the "Delta" logo and word at the front, and that the Delta plane has a single thin red line, whereas the AA plane has a blue, white, and red stripe along it.

Continuity: In the scene where the bad guys have taken the captain hostage and are in the garage about to steal the guns, there's a closeup between the captain & one of the bad guys talking. As the captain turns, you can see an extra at the back wall dressed as a cop. He leans forward a little like he's supposed to jump in, then backs off. He's not there before or after that.

Continuity: When Riggs and Murtaugh pull up at the construction site the windows on the car are clear glass, but when they send the car in without a driver the glass is suddenly black.

Deliberate "mistake": At the end of the film, Riggs shoots Travis through the blade of a bulldozer. While essential to the plot, no pistol caliber of any kind, even "armor piercing/cop killer" bullets, would pierce an inches thick, solid steel bulldozer blade.

Continuity: When Riggs and Cole are fleeing the bad guys in the pickup truck, Travis shoots out the back window. after they get out of the parking garage and stop to get the dog, the window is intact and the windshield is shot out.

Audio problem: In the scene where Rene Russo pulls the history on the MAC-10, the keystrokes aren't even close to being synced with what is appearing on the computer screen.

Continuity: Riggs sees the mugging, and rushes over to intervene. He leaps in, knocks the "mugger" to the ground, and has enough time to comment on the rubber gun before the director shouts "cut." - about 10 seconds. Was the director asleep?

Continuity: During the armored car chase, the bad guys' truck plate number ends "T2" while Delores' plate ends "E4". After Riggs tosses one bad guy out the back and decides to climb onto the outside, the trucks have switched sides with Delores curbside and the bad guy on her left. But two quick close-ups of the trucks bumping together shows Delores' truck is again on the left.