Other mistake: Roger intercepts Riggs and blocks the path of his truck. After agreeing to a plan, we hear Riggs driving off. But his original path is still blocked and we don't see him pass behind Murtagh, so he must have reversed direction (which seems unlikely since he's continuing his drive to the same destination). But for his truck to have headed the other way, he'd have to turn it around first, but we hear it simply drive off. (01:35:40)
Other mistake: When Riggs kills the guy who murdered his wife by dropping that cargo crate on him it's obvious the crate has no bottom and it falls around him, not least because the body's height doesn't change as the crate falls, there's no sign of impact or crushing, he just stays perfectly upright as it hits the ground. (01:39:25)
Suggested correction: This is simply not a mistake - we obviously know that the filmmakers didn't really crush an actor, but there's no visible clue of the SFX "deception."
Other mistake: When the car blasts out the container, the pallets which the money was on, don't come out with the money.
Other mistake: During the "high speed chase," Murtaugh stops the car so that Leo can retrieve Riggs' dropped gun from the side of the road. He picks it up and runs back to the car. Murtaugh says, "Give me that," and takes the gun from Leo. But, Murtaugh, being in the driver's seat, wouldn't be able to reach over the passenger seat and a foot or so outside of the car to grab the gun from Leo. It looks like someone in the passenger's seat just reached out and grabbed it.
