Me: “That’ll be $23.44, ma’am.”

Customer: *stares off into space*

Me: “…Ma’am?”

Customer: “What?”

Me: “How would you like to pay for this?”

Customer: “Oh right, I guess I have to give you money…”

Me: “I’d appreciate it.”

Customer: “…or, I could always steal it.”

(At first I think she’s kidding; but, after a long pause, I realize she is actually contemplating this.)

Me: “I’d go with the former, ma’am.”