Escalating introduces dangerous variables. I’m sorry your school is rife with bullying but honestly, the correct move in these cases is to just run away. Like I said, making a move to continue the fight prolongs the risk you are taking for a bad fall that could break your neck. Its all too easy.
Respectfully disagree. If you spend your life running away it changes your psyche. It changes the way you interact with the world, fear becomes the driving emotion. As my dad, who used to lead special forces groups used to say, it "leaves little grey marks on your soul". As long as the odds are not against you, stand and fight. You do whatever you think is right though, I understand your point and where you are coming from.