People Behaving Oddly Unit

Today I witnessed this exchange while waiting in line to buy my lunch. The woman in front of me had a bottle of Gatorade, or some other equally garishly colored drink, and a clear plastic take-away container with something vaguely golden brown inside. It was hard to tell, because whatever it was had steamed up the container.

The cashier rang her up, and the woman looked at the total. She said that it was too much. The cashier explained that it was X amount for the drink and Y amount for the french fries. The woman said, "Oh, this isn't french fries, it's chicken. I brought it from home and they cooked it for me in the kitchen."

First of all: huh? You're bringing food from home and having it cooked for you? You couldn't cook it at home and reheat it? Do you know something about the cafeteria food that the rest of us don't? Second, if you insist on such a bizarre lunch regimen, don't you think it would be a small courtesy to explain to the poor, baffled cashier what exactly is going on, so she doesn't have to guess and make a mistake? Wouldn't it make a ton more sense to head that off?