I was on a bus going from Madrid to the south of Spain. We passed through Córdoba and in a restaurant in a resting area I grabbed something to eat. The waitress served a coffee from which I took a sip, but then realized I hadn’t paid for it, and when the owner came and asked where was his coffee, I apologized and said I thought it had been mine. “But you didn’t even pay for it!” replied the waitress, “I know, I just thought it was mine”. She rolled here eyes and berated me in front of everyone.