I don't think I've ever heard of a bomb in my school but I'm from England, and what we have defo had is a hole school threat lol, as in schools go to other schools and go mad.
I've been in 2 fights for my school, not 2 fights fights, I ment 2 school fights, one where we all rushed down to palatine and all palatine was on a field and we was in a big time riot, and one where the other school came to us lol.