My Dad told me this story, he says it is true: A shift supervisor at the company where my dad works was irritated by the behaviour of one of his employee. Depite it being a busy day, all he had seen this person do was walk to and from the tearoom, sipping a cup of tea. Finally he decided to confront him, and said: "I have been watching you all day, just walking back and forth with a cup of tea and a cigarette. Now what's going on?" The employee didn't even blink. "You are out of coffee."
(From the "Rest" of RHF)