In literature, a humor character was one in whom a single passion predominated; this interpretation was especially popular in Elizabethan and other Renaissance literature. One of the most comprehensive treatments of the subject was the Anatomy of Melancholy, by Robert Burton. The theory found its strongest advocates among the comedy writers, notably Ben Jonson and his followers, who used humor characters to illustrate various modes of irrational and immoral behavior.
See N. Arikha, Passions and Tempers: A History of the Humours (2007).
Non sequiturs often appear to be disconnected or random comments, or random changes in subject, especially socially inappropriate ones. When non sequiturs are used frequently for comic effect this can be called "absurd humor".
The non sequitur can be understood as the converse of cliché. Traditional comedy and drama can depend on the ritualization and predictability of human emotional experiences, where the Theatre of the Absurd uses disjunction and unpredictability.