movie world on Instagram: "The knock-knock joke is a structured word play joke that uses call and response. The joke presents a scenario in which the speaker is pretending to knock on the front door of the listener. The speaker initiates the joke by saying “knock-knock”, and the listener responds by saying “who’s there”. The speaker then says a phrase to identify themselves, and the listener repeats the phrase and asks “who?” to request more information. The speaker then delivers a punch line us