I've drove a bus in some capacity for years. I've looked at the pictures on several websites and there is no way it could be anything other than distracted driving. No elevation change in a residential area? Something had to happen to cause him to jerk the wheel. Other thing that bothers me is that school bus roof looks like it desentigrated rather easily. That's not supposed to happen, makes me think that there were some structural issues that weren't addressed properly in the construction of the bus.