For what I know about Aussies, they fight fair. No weapons, man to man and then it's done.
The other boy is just a stinking coward.
I've witnessed local young rivals meet up to have their beef. whilst the others stand around to ensure no one else intervenes. Previous time it was a couple of girls. They did their thing and then everyone rode off as if nothing happened. Done and dusted.
Stabbing someone, let alone in the back, is just the lowest of low.