Me: Have you seen a Mr. Weewoo?
Most people: No.
Me: He drives the ambulance downstairs.
Listen up, genius. The joke is that Mr. Weewoo is the sound of an ambulance siren. So, he's not a real dude, he's an ambulance, and it's funny 'cause ambulances don't drive downstairs, that is so dangerous. I am telling you this because you didn't understand it.