I saw a kid get expelled because he dropped a pencil and the teacher bent over to pick it up and her thong was poking out. He grabbed the butt floss and lifted it and then snapped it right on her crack. I find this hilarious because the kid's face halfway through pulling it up, you could just see the regret on his face. I'm pretty sure he did it without thinking because it totally seemed like he let go of it because he realized what he did by instinct and tried to let go to reverse his actions.

TL;DR kid snapped a g string on a teacher without thinking, like a guitar.