Patron: I need help with the copier. I copied my documents face down (using the feeder) and they came out blank.

Me: Ok. Well, you need to copy face up.

Patron: Well, I thought you put them side down.

Me: *Points out the diagram* Nope. It's up.

Patron: Well, what am I supposed to do?

Me: *takes her paper and puts it in feeder face up* Print it face up?

Patron: Well, do I get a refund?!

Me: Um....no? *walk away*

Then I see her giving me dirty looks while she is checking out a book for her daughter. This is over 15 cents. And HER error.