5 stars for the bus driver. If parents aren't gonna beat the kid someone has to. Or he can go through his life calling authority figures mother fucker and see how that works out for him.
I'm still confused as to what happened just before that. What was the deal with the girl? Did she say something? Did he want her to come up for a reason?
And sorry, even if he did shout motherfucker, that response was totally unwarranted.
I grew up in Catholic Schools. If a nun didn't beat you, your parents usually finished off what needed done. Parents would come to our schools to discipline their kids. A lot of sawdust was used to clean up a lot of bodily fluids there.