Dumb and Dumber

Factual error: When the airbag blows in Lloyd's limousine, it stays inflated - it should instantly deflate. (00:08:40)

Factual error: Harry's tongue gets stuck to the chairlift, and stays stuck, even though it's not cold enough to see anyone's breath, or for everyone to need their jackets zipped-up. (01:11:30 - 01:13:35)

Factual error: When Lloyd drops Mary off at the airport, he watches her leave and then hits a parked car, inflating the airbag. First, the Cadillac Brougham Lloyd is driving was never available with a driver-side airbag, and secondly airbags are not designed to inflate after such a low-speed impact.

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Mistakes

Continuity mistake: At the beginning of the movie, Harry's van has bucket seats, yet later on when the "gas-man" rides along, he is sitting on a bench seat in-between Harry and Lloyd. (00:38:00)

Upvote valid corrections to help move entries into the corrections section.

Suggested correction: Mental isn't sitting on a bench seat, it's implied he's sitting on the floor of the van in between the both of them. Although hard to see, the backs of the bucket seats can still be seen behind Harry and Lloyd at certain points. You see a fair bit of it behind Harry whilst he's dancing as Lloyd sings the line "and if that mocking bird don't sing".

Suggested correction: Maybe the bench-seat folds down; out of the way somehow?

dizzyd

There's no evidence of this, especially since we see the floor where the bottles are. And it doesn't explain where the bucket seats went.

Bishop73

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Quotes

Lloyd: What do you mean you don't bet? Wussy! Wussy!
Harry: I never have and I never will.
Lloyd: Yeah, right. I bet you twenty bucks I can get you gambling before the end of the day.
Harry: No way.
Lloyd: I give you three to one odds.
Harry: No.
Lloyd: Five to one?
Harry: No.
Lloyd Ten to one?
Harry: You're on.
[Lloyd and Harry both shake hands and smile.]
Lloyd: I'm gonna get you.
Harry: Nuh-uh.
Lloyd: I don't know how, but I'm gonna get you.
Harry: Nuh-uh.

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Trivia

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Questions

Question: What is the trailer both were watching on TV while they were having some snacks in bed in the Aspen hotel room?

Answer: It was a commercial for Pacific Bell. A telephone company.

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