Deliberate "mistake": Riggs handcuffs himself to the depressed businessman. They jump off the building but they're not handcuffed to each other anymore. They used plastic cuffs which could separate during the stunt in case anything went wrong. They break just as they jump, so they grab each other's hands to stay in contact.

Continuity: In the scene where the girl jumps to her death from the balcony, it shows her hitting the car towards the right halfway onto the windshield. Then in the next shot, it shows her laying right in the middle of the roof of the car.

Continuity: In the scene where "the General" and his driver were fleeing down the alley, the diver is shot. The general takes control of the wheel and carries on driving, but the car is in park...

Continuity: At the end, when Riggs is at his wifes grave, it's supposedly raining. In one shot you see Riggs' hair is dripping wet, and when you see him bend down to put the flowers on the grave in the next shot, his hair is dry, and in the next shot it's wet again.

Continuity: During the scene where the General is escaping in the car and Murtaugh shoots the driver. When the car is hit by the bus on the avenue you can see part of the device that makes the car flip over and roll away from the crash.

Audio problem: When Hunsaker gets shot through the window we hear the sound of a pane shattering, but there is only a small hole with a few cracks in the glass (not really typical for an ordinary window anyway).

Visible crew/equipment: When the car crashes into the bus and lands on its top, you can see a big square hole cut out of the car's underside.

Continuity: When Hunsaker's shot, his eggnog gets all over his tie and shirt. When the camera angle cuts to Murtaugh's reaction, Hunsaker's shirt and tie are clean and there is no eggnog pouring from the container. Also there is no hole of any kind in the glass door behind him in which the bullet made.

Continuity: There is a scene where Riggs and Murtaugh are driving in a car, and the column shifter keeps going from park to drive and back.