I'm not really sure WHAT to do... but on mine and my best friend's way home on the bus some guy infront of us was throwing things and one of the things hit my best friend to which she yelled at him and said "STOP THROWING THINGS!" and that's where it all began... I'm one of those people who usually stay hidden and no one even knows that I exsist. I've seen this guy do things to people on the bus all the time... well... he turns around and chunks something at her harder and I yell at him to stop it, and he tells me to F off, but i'm just like "TURN AROUND!!!" and then the girls behind us who is his friend start saying that they are going to kill us... meanwhile he is threating to bust our teeth in... And the bus driver just watches as he drives.. and doesn't stop them... what can I do? and what if they actually try to do something on the bus tomorrow to us? or what if they do something at our bus stop while we're waiting for the bus?