The conversation between Halt and Horace at the beginning of Oakleaf Bearers really has to be seen to be believed.
Halt: (thinking Horace is about to ask a question) WHAT?
Halt: That's what I want to know. What?
Horace: (bewildered) What?
Halt: Don't keep parroting me! Stop repeating what I say! I asked you "what" so don't ask me "what" back, understand?
Horace: (very slowly) No.
Halt: You were about to ask a question.
Horace: I was?
Halt: You were. I saw you take a breath to ask it.
Horace: I see. And what was it about?
Halt: That is what I was asking you! When I said "what", I was asking you about what you wanted to ask me.
Horace: I wasn't about to ask you "what"?
Halt: Then what, if I may use that word once more, were you about to ask me?
Horace: I forget. What were we talking about?