A scene in PJC

....Some of us were teaching last week when we noticed a group of students eating from across the next block. Not only were they eating and drinking, they were also doing it right in front of an elderly cleaner who was erasing the white board. It was a sad case of blatant nonchalance and inconsideration. She had a black bag of accumulated litter with her and had just finished sweeping the floor. A colleague and i went over and decided to speak to the class concerned. To our horror, we managed to catch one of them, behind the class, casually leaving a piece of food wrapper on the desk, right in front of a bin and just when the poor attendant had finished her cleaning duties. The following dialogue with the boy went like this.
The tone was gentle, mildly colloquial and objective:
Teacher1: Hi, what did you just do?
Student(looks surprised): Oh, sorry.
Teacher2: Ok, pls pick it up...(pause)... By the way, do you know who this lady is?
Student1: Huh...errr... errr, school worker.
Teacher1: What is she doing?
Student: Errr, cleaning.Teacher1: ok...mmm... what did you just do?
Student:(silent...pauses for a long time, probably too embarrassed to reply..even gave sheepish smile, as he recognised..too late perhaps... the sad state of irony in the matter raised)Teachers(we were not smiling): ......Rest of students (one was quiet, 2 continue to giggle at student):........School Attendant; looking detached and continued with her work.