Customer: “Can I get a cheeseburger and a bottle of water?”

Me: “Yes, that’s $3.70, please.”

(The customer holds out five napkins and starts counting them. He then hands them to me as payment.)

Me: “Sorry, do you have $3.70?”

Customer: *points at napkins* “Yea, there! Look!”

Me: “Those are not money. Do you have any money to pay?”

Customer: “Yeah! I’m paying with napkins!”

Coworker: “Sorry, we only take money…”

(Eventually, security had to come and him (and his napkins) away from the tills.)