John and Sir
Sir is comfortably installed in an armchair in the library, reading a newspaper.
Suddenly, John rips the door open and shouts: "Sir, the Thames is flooding the streets!"
Sir looks up calmly from the newspaper and says: "John, please. I have already told you. If you do have something important to tell me, first knock on the door, then enter and inform me, in a quiet and civilized manner, about the issue. Now please, do so".
John apologizes and closes the door behind him. Three seconds after, Sir hears a knock on the door.
"Yes?"
John partially enters the room, and with a wide gesture makes an invitation as for somebody on the outside to enter: "Sir, the Thames".
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