Replying to Teacher doesnt know

ok so im sitting at lunch with my friends when my geometry teacher mr warren walks over. hes the type of guy thats obsessed with the 60's and hes a total hippy.so earlier that day he had given us an assignment that each one of the people in my class would by assigned a section of the book and we would have to teach that section.i was being sarcastic and telling him that i was excited so he said 'good ur my first volunteer' i thought 'oh shit'.so one of my friends is like 'whats in that section?' mr warren replied 'how should i know'and continued to eat his milky way.