Samberg and Hader are at a party where everyone and everything is a literal representation of a slang term (i.e., a "serial rapist" (Forte) is shown having sex with a box of cereal, a group of "motherfuckers" are men with their mothers, a group of "sons of bitches" are a litter of puppies, a "numbnuts" is a man (John Lutz) shown sitting on a block of ice with his pants around his ankles, a group of "jokers" are dressed as different incarnations of The Joker from The Dark Knight, a knucklehead is a hand with plastic eyes glued on it, etc.). When Samberg and Hader discover "two douchebags", however, it's revealed that they're looking at themselves in a mirror. (thetvdb.com)