Teacher: "OK, I can see we're having a lovely discussion here... perhaps you can come back and continue your lovely discussion at lunchtime!"
Pupils: "Ha, good one sir."
Teacher: "Right, if you keep talking, you'll be talking your self into a detention."
Pupils: "Ouch, that was cold blooded, sir."
Teacher: "Well, you're all chatting away, so you must all be finished! I guess it's time I set you some extra work!"
Pupils: "Ha, excellent wordplay, sir."
Teacher: "Odd, I asked for silence, but that's not my idea of silence."
Pupils: "I bet it isn't, sir!"
Teacher: "You haven't quite got the hang of being quiet. Maybe we can come back at lunchtime and practice it?"
Pupil: "Ha-de-fucking-ha, sir."