This definitely would count as one of the worst nightmares you lived through. Sounds like the day was a bit too much, things really are rough out your way.
I guess your shool buses (cars) don't have mandatory seat belts or you all wouldn't have gotten bounced around like that, glad no one got seriously injured ( excluding the fellow student who got shot and the other who committed suicide) Very sad.
It's rough on all students when something like this happens, hope everything will be uphill from here on in.