From my former supervisor at Cambridge (he was very witty):
"That was just sagaciously expressed... Michael, can you repeat what he just said? No? Pity..."
"Of course I've marked your exams. In fact, I spent three solid days marking them. I marked them in bed, in the shower... It was very challenging. I had to use indelible ink."
"The exam was very easy. I know all the answers. The answer to number one was yes... What's that, Alex? No, that was the answer to number three..."
"What would you write to a professor if you wanted to tell him you had a problem with him? Would you write, 'Dear Professor, I hate you. Love, Freddie'? I would be very amenable to that sort of letter, particularly if it were coming from you..."