(At the checkout line, a customer and her grand daughter have placed mood rings all over their fingers.)

Customer: “Isn’t it amazing how they know exactly what type of mood you’re in?”

Me: “Would you to add any mood rings?”

Customer: “No.”

Me: “Well, it will be [price].”

Customer: *pays*

Me: “Your change is [change]”

(I hand the customer one of the new five dollar bills.)

Customer: “I think this bill is counterfeit.”

Me: “I assure you, it’s not ma’am.”

Customer: “Sure it is, it’s colored.”

Me: “It’s actually a mood five. It changes according to your mood.”

Customer: “The things they do with technology!”