A pun is a form of word play that utilizes homonyms or similar sounding words in a humorous manner. Puns have a long history in the Callahan's universe. Common praises for puns in the Callahan world include groans, peanut showers, smashing glasses into the fireplace, and pinching your nose and running from the room screaming via windows and doors (considered the highest praise). Although Tuesday night is dedicated to punning, they occur nearly constantly at the Callahan's bars.