Lethal Weapon 4 (1998)

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.

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!

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)

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.