Hahaha I see, well still it was once, I've met a few that have let multiple ones out in the middle of class.
Granted the students just ended up saying it cause the teacher could say it.
That brings back memories, there was generally always someone talking in the class. Sometimes I was lucky and didn't sit near them, other times I wasn't it.
It's a bother for the other students and if they stay anything an argument starts, it's quite the cycle.