Well, if he wanted to overtake, why don't you just let him? What
is the point of speeding up becos of the provocation? He may not
treasure his life but I'm sure your family treasures yours.
And the fact that you will rather speed up than let a faster car
overtake shows you may have some problem with your mentality as
well. He has a problem with HIS attitude by horning/flashing, but
you dun have to join him as well. No offence. 