Halloween II (1981)

Other mistake: Watch the scene where the drunk Ben Tramer (wearing a similar Michael Myers mask) was hit by the speeding cop car and then pinned against the parked van before burning. Even taking out the equation of accidentally hitting Ben Tramer, what was the cop car doing speeding at that rate of speed, head on towards a parked van on a side street? Remember, we only hear screeching brakes after the car hits Tramer, and we never see the cop car swerve or any of that to miss hitting the van. Seems that even if Tramer hadn't been there, the cop car was sure to barge head on right into that van.

Sam Loomis: I ought to handcuff you to the wheel, but I have a feeling I'm gonna need you in there. Can I trust you?
Marshal: What have I got to lose, except my job?

Trivia: Director Rick Rosenthal wanted to maintain the tactful and tasteful, slow-burn nature of the original film, and his original director's cut lacked blatant gore and nudity. However, writer/producer John Carpenter felt horror fans would not accept a film without extreme content due to the rise of various extremely graphic slasher-films in the wake of the original film. Thus, Carpenter went back and ghost-directed several new scenes to add in extra nudity and violence into the movie. (And if you watch the movie very closely, these reshoots can be pretty obvious, as they don't quite fit in with the rest of the film).

Question: How can Michael recognize Laurie as his younger sister since he wouldn't have seen her since she was only two years old?