Continuity mistake: In the scene where Riggs is chasing Joshua and is told by Murtagh to take a shortcut to catch Joshua, he is shown running in bare feet. After shooting at Joshua from on top of the freeway he then runs down the embankment and is shown wearing tennis shoes, but there is nowhere these shoes could have come from and he is never shown putting them on.
Continuity mistake: The first time we see Riggs he is lying in bed with a cigarette, almost finished, in his mouth. He gets up and goes to the fridge. When he opens it the cigarette looks like it has hardly been smoked at all. (00:06:25)
Continuity mistake: When Riggs sees the car with Mr. Joshua coming he pushes the hooker away and starts running, but when he is shot at it looks as if he was standing with his back to a shop window. Accordingly, his bullet-proof vest has holes in the front, but then his red jacket has only holes in the back. (01:05:50 - 01:07:15)
Continuity mistake: When Murtaugh is about to find the envelope with the porno tape he takes a can of beer from the fridge and opens it. When he is sitting down, the same can of beer is opened again audibly. (00:49:25)
Continuity mistake: Director's cut (or extra scenes on Lethal Weapon 4 DVD): When Riggs is sitting there at the beginning of the movie, he is crying and looking at the picture of his wife on the right and wedding day on the left. Earlier in the movie when the picture was setting on the TV set his wife's picture was on the left and his wedding day picture was on the right. Not only that, but in at the start the pictures are in a folding frame. During the near-suicide scene they are not. [The first scene shows Riggs has damaged the frame, and says to the photo of his wife, "I'll buy you a new one." which explains the later changes.]
Continuity mistake: In the scene just after the jumper, Murtaugh pulls Riggs into a room and asks Riggs if he wants to die. He hands Riggs his pistol. When Riggs puts the pistol to his temple you can see and hear him cocking the hammer. After some arguing about the positioning of the gun, Riggs then puts the barrel unter his chin. While he's pulling the trigger the camera goes to a close-up of the pistol and shows the hammer pulling back, as he squeezes the trigger. (00:34:40)
Continuity mistake: A quick shot from the interior of the General's car looking at the approaching bus, a metal guard is seen on the front of the bus, painted white to match. It is not there in the shots before or after. (01:42:15)
Continuity mistake: In the scene where they bring Murtaugh's daughter and her arms are bound, when she puts her arms over her dad's head her watch is on her right wrist. After they hang her arms over the pipe her watch is now on her left wrist. (01:28:05)
Continuity mistake: When Riggs is talking to Mr. Joshua before the electrical shock treatment starts, every time the camera shows a side shot the water is covering his head and face, but every time the camera angle changes to the front he is completely dry and the water is in the background nowhere near him. (01:20:20)
Continuity mistake: When the bus hits the General's car, the bus windshield (at least on the driver's side) is all smashed up as seen from the shot inside the bus. However, when the bus backs up, and in later shots of it, the windshield is undamaged.
Audio problem: In the beginning, when Murtaugh's daughter comes downstairs in the black dress the dialog is dubbed in. After the spin, she's talking but she doesn't move her mouth (even before the spin she isn't in sync). Her little sister replies and doesn't move her mouth either.
Continuity mistake: In the scene where Riggs is jumping off the bridge when chasing Mr. Joshua, first he has a rifle in his hand, his shadow on the bridge shows no rifle, when he lands he picks the rifle up off the ground and keeps running.
Continuity mistake: After Murtaugh teams up with Riggs they walk through a parking garage. A police car drives by them twice (at walking speed, with its lights on - in the garage), first in a closer, then in a wider shot, while the dialogue continues, ruling out any artistic intention of this repetition. (00:20:25)
Continuity mistake: When Riggs is standing in the schoolyard during the sniper scene, he is standing on a large rubber safety mat near the monkey bars. But the close-up of his feet shows he is standing on bare concrete (Director's Cut). (00:13:10)
Revealing mistake: When the General holds the lighter under Mr. Joshua's arm there is no smoke from burning hair at all. (00:23:50)
Continuity mistake: In the last shot before Amanda crashes on the car, the red car in front is parked in a different angle than when she is lying on the roof. (00:03:55)
Continuity mistake: When Riggs and Murtaugh walk toward Dixie's house before it blows up, they're wearing large clear glasses, almost like the safety glasses they were wearing at the firing range. After the house blows up they aren't wearing them anymore or even seen taking them off. (00:56:20)
Continuity mistake: When Murtaugh clips on another target it's crumpled at the side. When it comes back after he has shot, it's clipped on straight. (00:55:00)
Continuity mistake: Towards the end of the meeting between the General and Mendez, Mendez steps backwards and bumps into one of the General's men. He turns around and makes some jerky moves with both arms. The camera cuts to the General, and we see Mendez in the background colliding with the other guy once again in exactly the same way as before. (00:24:25)
Continuity mistake: During the drive-by shooting it's raining heavily. When Riggs and Murtaugh leave the scene by car the streets are dry, but when they arrive at Murtaugh's house they are wet again. (01:08:10)
Chosen answer: He was one of Hunsacker's men.