Me: (enters the classroom with an angry face) "What are you guys doing?"
Students: *silent, afraid to talk
Me: "Come on, you're sitting there! That's what you're doing!"
Student: "May I go to the CR?"
Me: "Sure! The Canteen Room or the Comfort Room?"
Student: (with a silly smile) "Both, sir."
Me: (grabs coins from my pocket) "Buy me juice."