Dumb and Dumber (1994)

Lloyd Christmas is a dim-witted limousine driver who falls head over heels for a young woman named Mary Swanson when he picks her up to drive her to the airport. But when he sees her leave her briefcase there, he snatches it up before two thugs arrive to pick it up. Unfortunately he doesn't get to her in time, so he decides to take a trip to Aspen where she said she was heading so he can deliver it to her himself, thinking that she'll be so happy to see it she'll fall madly in love with him. Lloyd's friend Harry Dunne, also a bit slow and stupid, is in the pet grooming business when he loses his job. Lloyd loses his job as well, and both desperate Lloyd tells Harry about his plan to go to Aspen. So they go in Harry's van (that looks like a sheepdog) and take a cross-country road trip to Aspen, Colorado. The criminals follow them because they are after the same briefcase. Hilarious hi-jinks ensue as they take the wrong route and end up in Nebraska, and they accidentally kill one of the thugs by feeding him rat poison. What Harry and Lloyd don't realize until later is that there's ransom money in the briefcase, which Mary had purposely left at the airport terminal in exchange for her husband, who's been kidnapped. A crude but funny comedy; Carrey and Daniels are both very convincing as the two dim-witted pals. Starring Jim Carrey, Jeff Daniels, Lauren Holly, Mike Star, Karen Duffy, Teri Garr 7/10