Not sure if this counts (this is moreso just completely ignoring school rules), but we once spent an entire 90 minute AP Physics C class making Chicken And Waffles and playing Jenga, which was the only thing we did remotely related to Physics that day. We deadass brought the ingredients to make batter in class, a waffle iron to cook them, some maple syrup and honey mustard to support it, a few people skipped 2nd Block to go to KFC and get chicken, and we stole utensils from the cafeteria.
It's amazing what you can get away with in small, high-level classes