(The customer’s total is $9.67. She hands me a ten dollar bill and three Canadian quarters.)

Me: “I’m sorry, ma’am, I can’t accept this change.”

Customer: “Why not? It’s 67 cents and I gave you 75.”

Me: “Right, but this is Canadian currency.”

Customer: “So? They’re still quarters.”

Me: “Right, but they’re Canadian Quarters. I can’t accept foreign currency.”

Customer: “Canada’s not foreign! It’s in America!”