"Dumb and Dumber" is a prime example of slapstick comedy, a genre that relies on exaggerated physical humor and absurd situations. The movie's protagonists, Lloyd Christmas (Jim Carrey) and Harry Dunne (Jeff Daniels), are two dim-witted but lovable friends on a cross-country road trip to return a lost briefcase to its owner. The film's humor is largely visual, with the two leads getting into various misadventures and mishaps along the way.