Woman: “Your f***ing machine won’t accept my memory card from my camera!”

Me: “That’s very strange ma’am, as our machines accept all of the memory cards that I’ve ever heard of.”

Woman: “Well, your machines are obviously old! My husband bought me an EXPENSIVE camera, because I only like the best! You people need to get better machines! My memory card won’t even FIT in any of the slots!”

Me: “May I see your memory card? Maybe I can figure out what’s wrong.”

(Woman hands me her memory card huffily.)

Me: “Um… ma’am, I don’t know how to tell you this, but this is your camera battery.”

Woman: “…”

(She snatches her battery out of my hands and storms out of the store.)