Lethal Weapon 4 (1998)

Revealing mistake: During the big gun battle right before the last fight scene, Riggs is shown driving a forklift, and knocking over some barrels on top of Wah Sing Ku, leader of the Triads. When the forklift does the 180° turn, you can see that it is not Mel Gibson, but an Asian stunt man.

Continuity mistake: During the car chase involving the car driven by the Chinese guy, Murtaugh, and the mobile home, the two cars slide against each other and the right wing mirror on Murtaugh's car is completely wrecked. Once the two cars are separated the wing mirror has miraculously repaired itself. The left wing mirror also does a disappearing / reappearing trick.

Continuity mistake: In the scene near the end of the film when Murtaugh shoots at Wah Sing Ku and mistakenly kills the last of the four fathers, you can clearly hear an empty shell casing hit the floor, although he is using a revolver, which do not spit out the empty shells as they are fired.

Trivia: After Riggs shoots the valve on the napalm tank being worn by the criminal with the flamethrower at the start of the film, the legendary "Wilhelm" Scream can be heard as the criminal goes flying. (00:05:05)

Trivia: As Mel Gibson, Danny Glover and Chris Rock leave the Chinese restaurant (down the stairs), you can see the umbrella handed to Chris Rock hit him in the face.

Trivia: In one of the takes when Riggs and Murtaugh crashed through the window of the office building, one of the window washers was actually hit (from the "making of's"). Obviously the one in the movie was not this take.

XIII

Lee Butters: You have the right to remain silent. So shut the fuck up. You have the right to an attorney. If you can't afford an attorney, we will provide you with the dumbest fucking lawyer on Earth. If you hire Johnny Cochrane, I'll kill you!

Roger Murtaugh: You ever hear of Ebony Clarke?
Martin Riggs: Yeah, she writes those cheesy sex novels. Why? You boinkin' her?
Roger Murtaugh: No I'm not boinkin' her! Trish is Ebony Clarke!
Martin Riggs: Oh, so you ARE boinkin' her.
Roger Murtaugh: Yeah... Yeah, I'm boinkin' her!

Leo Getz: They fuck you with cell phones. That's what it is. They're fuckin' you with the cell phone. They love it when you get cut off. Y'know why, huh? You know why? 'Cause when you call back, which they know you're gonna do, they charge you for that fuckin' first minute again at that high rate.

Question: In the beginning of the movie when the tanker truck gets blown up, why does the fully intact truck just get launched straight up with flames below it? The source of the explosion would be the truck itself, so when ignited, the truck should have simply been blown up into a million pieces, not launched straight up fully intact.

Question: Something I really don't understand about the ending. Riggs is looking over his former wife's grave when his beeper tells him that Lorna is expecting their baby. He races to the hospital and there she is about to give birth. So who drove Lorna to the hospital? Can't have been Riggs as he wouldn't have left at a time of need just to see his wife's grave. Doubtful that Lorna drove herself, and no relatives were there (as we see at the end). So what other explanation is there?

Gavin Jackson

Question: I wonder, what was the point of having a gunfight with the armored man at the beginning of the film?