A well-dressed man of about fifty is walking through the cheese and wine department, obviously looking for something and obviously agitated. I approach cautiously, smiling and bracing myself.
"Is there something I can help you find?"
"Where would I find grapes?"
I paused momentarily, letting the question sink in. "Those are in the produce department, sir."
"All the way on the other side of the store?" he asked, incredulously.
"Yes sir. Back where you came in. Where all of the other fresh fruit and veg are."