I'm not allowed to say who this was, but imagine a young, fit girl coming to America to learn English. She gets a job taking orders at the fast food counter. Coming from a culture where they don't do fast food or coke , she was a bit hazy on the overall concept . One day she asked me the name of the foam on top of a draft coke and I told her it was head. I later heard that she was asking people who ordered fizzy drinks if they wanted head with that.