Did you think it would move and so you didn’t slow down? Did you think it reasoned that a big-ass-car-with-a-woman-chatting-on-her-cell is coming, I better get out of the way?
Did you NOT see that huge-winged flying creature? Did your brakes fail? Did you have a lapse of attention? Or are you some son-of-a-bitch who thinks nothing matters but yourself?