* AlternateCharacterInterpretation: Nick didn't choose to have a SplitPersonality at all. What we're witnessing is a young man's descent into madness.
* EnsembleDarkHorse: Both Justin Long and Fred Willard's characters as well as just about any of the reputable character actors with smaller supporting roles.
* MagnificentBastard: Nick shows signs of a budding one. Francois on the other hand [[UpToEleven takes it to the extreme]]. Though subverted when Nick stops letting Francois control things; he tries to be magnificent, but goes all [[SmugSnake smug]] instead.
* OneSceneWonder: Zach Galifianakis, SteveBuscemi, FredWillard and M. Emmet Walsh.