I kind of doesn't like those other classmates came with. I guess I don't care too much as it can set up an interesting story on some of the classmates being persuaded into things they'd normally not do and having to rescue them while also taking care of classmates that want to kill you.
I just kind of wish that the girls didn't die or the people left on the bus was still alive. I always find it sadder when a girl dies ( I know, Sexist right?) Like if there were two school buses with one full of girls that had too many girls so one of them had to be on the male bus.
I also find it weird how quickly people were ready to become a murderer