Heh. Sounds fun. Wish I was there.
I can only clearly remember one of the fights I was in, because it was the funniest. This guy had been pissing me off all day. So, I artfully dug my shoulder into his in passing and knocked him over. This was in the computer labs, by the way. Brilliant place to fight. He then chased me down as I walked out, grabbed me as I was leaving, and slammed me up against a wall. He sat there punching me in the gut for like, a minute, and I just stood there smiling at him until the teachers dragged him off me.
No knives though. Australian schools tend to be less tolerant of grevious bodily harm then then indifferent industry you Americans call an education department. Pulling out my knife and laying into him would have guaranteed that I'd never finish my schooling, never get a qualification, and never go to university.
That said...it seems you're refusing to produce evidence of this said fight. Probably not the smartest choice, regardless of the reason. You'll be labelled an attention whore.