Corrected entry: There's no way on earth Riggs and Murtaugh would still be cops in this film after the end of Lethal Weapon 2 where they both threw down their badges and went on a bloodbath, killing men who were protected by the US government. If anything, they would both be serving hard jail time.
Corrected entry: 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. (00:45:00 - 00:46:00)
Corrected entry: In the scene where Murtaugh shoots Darryl after Riggs is shot, where does the silver automatic pistol that Murtaugh shoots Darryl with come from? Also where does it go afterwards? When Murtaugh gets up to move towards the shed Darryl was in, he is holding his own six shooter. The silver gun doesn't belong to Riggs, he has a black Beretta.
Corrected entry: In the scene where Jack Travis asks to see Billy Phelps, he is told "He's down the hall on the right." The room he's in is actually at the dead end of the hall. (00:32:20 - 00:34:55)
Corrected entry: When we first see the side of the jaywalker's head, his sideburns are down to his earlobe, next time we see him they are only down half way.
Corrected entry: 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.
Corrected entry: When Riggs hits the brakes, sending the seatbelt-less bad guy through the windshield, there's one flaw: They're in an armored truck, and the solid, bulletproof glass of the windshield would easily deflect the guy.
Corrected entry: When the cops at the shooting range are showing the, "cop killer" bullets, they shoot through a bullet proof vest, both sides. At the end of the movie Rene Russo is shot with a cop killer bullet, but it does not kill her because she is wearing two bullet proof vests. This would not stop a cop killer bullet. It had already been proven to go through two layers of kevlar, not to mention the bullets go through the thick steel of the bulldozer blade.