Was he from South Africa, he was probably pissed off that NZ beat them in the world Cup.
Seriously, you did the right thing in reporting him. If he slowed his car down enough to be next to you for a few seconds, then he saw you and should be made to pay any bills that need paying.
It will also give him a wake up call when the cops go around to his house and give him the "you shouldn't drive like an arsehole chat". I would like to witness that conversation.
It's good you were still able to ride, but not the wisest thing to do. I have been guilty of the same thing. Adrenalin kicks in and you feel little pain then 1 hour later the pain starts.
I hope everything heals OK.
CHEERS
Mark