Blackadder: What is the colour of the Queen of England's favourite hat?
Darling: How the hell should I know?!
Blackadder: (completely deadpan) I see…Well, let me ask you another question. What is the name of the German head of state?
Darling: Well, Kaiser Wilhelm, obviously.
Blackadder: (furiously) So you're on first name terms with the kaiser, are you?