What happened in the morning of 25/3

We were reading in relative quiet until a "paper war" started. The fight started in somewhere our class calls "Bangladesh" [no offense meant, its just what we call it... there's a "Siberia" too...] but spread to the center section of the class. One of our classmates, Jia Hao, was hit by a paper ball thrown by Shan Yao {citation/clarification needed} but the victim assumed that it was Zi Yang, another classmate.
Zi Yang blamed Edward, and the two started yelling and pushing the blame back and forth. At that moment some people seemed to "wake up" to the fact that something abnormal was going on. Only Nicholas and Dexing continued to live in blissful ignorance that something big was going on.
Some tried to stop it, but others watched on, unsure whether they should help or, as our teacher put it, "xiu shou pang guan"
So then Mr. Krison came in. When he tried to settle things, they escalated and Zi Yang was screaming inarticulately. I remember him saying something like : "Since you don't like me, kill me!!!" {citation/clarification needed}
So after all that mess, our seating arrangements were changed for damage reduction.
I think we should have tried to stop them from fighting, as we all have a rsponsiblitly to our class