Why did the meeting planner get arrested?

This joke is a perfect example of wordplay, specifically a pun, where a single phrase has two very different meanings. The humor comes from the sudden, unexpected shift in interpretation. The phrase "set up" is the star of this comedic show, doing double duty to create a clever twist.

In the world of work, particularly for someone in a role like a meeting planner, "setting up" is an entirely innocent and essential part of the job. It refers to organizing the room, arranging equipment, preparing materials, and generally getting everything ready for an event or gathering. It's a task focused on preparation and logistics.

However, the punchline takes "set up" in a completely different direction, implying a more sinister act of tricking, entrapping, or framing someone for a wrongdoing. The sudden jump from the mundane, organizational duties of an office job to a dramatic, criminal accusation is what makes this joke unexpectedly funny and highlights the cleverness of language.