Two true stories......
I was doing circuit training and part of the PPL was doing them at an international airport - the nearest to me being Dortmund which, although international, isn't that busy. There's me pounding my circuits when I heard "Air Berlin XX, ready for departure, Runway 24" Tower came back: "Air Berlin XX, hold short, Runway 24, Cessna on Final" to which came back: "Air Berlin XX, ready for IMMEDIATE Departure Runway 24" (with emphasis on the immediate) to which Tower said "Negative, Air Berlin XX, Hold short Runway 24, Cessna on short final". If looks from the Air Berlin Pilots could have killed, I would have been going home in a dustbin....
Waiting at an airfield to depart, I heard a pilot call out "request approximate time check" to which the tower responded "Sunday". It was very approximate, being a Saturday........