Not quite Stupid Pax comment but still aviation themed, we had a visitor to the Ops room, commercial banker, allegedly inteligent, anyway during his visit there was a rwy change - he questioned the reason for this with the serious comment i assume they do that to save wear and tear on the tarmac, It was hard for the entire ops room to keep from bursting in to laughter,anyway we managed to stay profesional maintain straight faces and explain the basics to him.