After he mouthed off and basically wiped his hands clean of any wrong doing in his mind, that would have been the tipping point. I would have called the cops just to return his pompous attitude back onto him and let him deal with the embarrassment.
I would have told the cop "I'm not seeing any damage, but hard to say if anything structural is wrong given the size of his vehicle, but want to trade information just in case. I wanted to get his info but he walked off after he acknowledged that he ran into my vehicle"
Would be worth the price of admission.