I hope my classmates get [Rude]

[BAndrew]

Actually no, but I am really pissed off right now. My classmates today were acting like idiots. Their IQ instantly got multiplied by 0.
Let me explain what happened:
There was going to be an earthquake exercise (preparation should I call it?). The bell rang three times during class lesson and we were supposed to exit the building safely and carefully. However, my classmates (and other students) started running and screaming like animals (this is not a joke) and eventually they hit with momentum other students, therefore causing a real catastrophe. Some students fell down the stairs and got injured. I instantly frozen and didn't know what to do and I still have trouble getting it. As a result, we had to stay 1 hour more than usual because of this, a few students got injured and others got a 3-day expulsion.

Has anything crazy like this happened to you? How am I supposed to react? I really can't calm down and I am starting to get worried.