Customer: “Looks like I’ll need cash back today.”

(The customer opens his wallet. It’s empty.)

Me: *laughs* “Oh, I know how that is.” *joking* “But I never even have the cash to get back.”

(The customer gets $40 in cash back. I hand him two twenties.)

Me: “Twenty and forty, have a good day, sir!”

Customer: “Thank you!”

(He walks off a moment, then turns around and tosses one of the twenties I handed him onto the register.)

Customer: “A little cash back for you.” *smiles*

(Before I can protest, he leaves. I wound up using that $20 to fill my gas tank. Thank you, sir!)