Continuity: 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.
Quotes
Harry: Skis, huh?
Beth: That's right.
Harry: Great. They yours?
Beth: Uh-huh.
Harry: Both of them?
Beth: Yeah.
Harry: Ah, cool!
Mistakes
After Harry and Lloyd start gagging over the atomic peppers, we see a brief shot in which everyone else in the restaurant looks at them (and the waitress suddenly appears in that shot as well). But in very the next shot (back to Harry and Lloyd, still gagging), nobody is looking at them (and the waitress, who was there just a moment ago, disappears). See more...
Trivia
Seabass actually makes an appearance in Me Myself And Irene as one of the Maine State Troopers at the end of the movie. In both cases, Seabass is played by ex-Boston Bruin, Cam Neely. He's a good friend of the Farrelly Brothers, and Jim Carrey. See more...
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Dumb and Dumber (1994)
Directed by Peter Farrelly, starring Jeff Daniels, Jim Carrey, Lauren Holly (add more)
Dumb and Dumber mistakes
Continuity: When Lloyd tackles Mary on the hotel stairs, she is wearing black pantyhose. By the time they get to the hotel room, she has miraculously changed into grey tights.
Visible crew/equipment: When Lloyd is daydreaming about Mary as the doors to Mary's house open and Lloyd picks up Mary. He lifts up her skirt to show a little flesh, in the background you can see the feet of two crew members laying on the ground holding the doors open.
Dumb and Dumber trivia
I think that this may be an in-joke. If Mary Swanson had chosen Lloyd instead of her fiancee and married him she would become Mary Christmas.
Jim Carey really has a chip in his tooth. For the filming of Dumb and Dumber he had the cap on his tooth removed.
In the bar scene when Lloyd leaves he sees the newspaper clipping on the wall and says "No Way! We Landed on the moon?" and walks out, that wasn't originally in the script, Jim Carrey just improvised that line and it was left in the movie.
Dumb and Dumber quotes
Harry: Yeah I called her up, she gave me a bunch of crap about me not listening to her, or something, I don't know, I wasn't really paying attention.
Harry: Why would she have you meet her in a bar at 10 in the morning?
Lloyd: I just figured she was a raging alcoholic!