Teenage customer: “I’d like to return The Hunger Games.”

(Note that she had just purchased The Hunger Games a few minutes ago. As is customary, I ask if there’s anything wrong.)

Me: “I’ll be happy to return this for you. Were you not happy with it?”

Teenage customer: “Oh, I just changed my mind. I thought of something better that I wanted.”

Me: “Oh, what’s that?”

Teenage customer: “Twilight!”