(Our shop has a chocolate fountain which we fill up daily, to attract customers who can buy marshmallows to dip into it.)

Customer: “So, where does the chocolate come from?”

Me: “… sorry?”

Customer: “The chocolate for the fountain thing. Where does it come from?”

Me: “Well, we melt some chocolate, then fill–”

Customer: “No, where does it COME from? Like the water pipes or something?”

Me: “No we melt our own–”

Customer: “Don’t lie to me! I know you got a chocolate pipe plugged into that thing! How do you get one!? Where is your manager?”

(After failing to convince them, the customer leaves angrily. It’s now a running joke in our shop to call the “National Chocolate System” whenever there is a problem.)