Good news is with the summons out he's already going to suffer some aggravation and have to retain an attorney which will cost him a few bucks.
Given the circumstances it looks like you did as well as could be hoped. Trying to not escalate while still defending yourself is the best approach, and getting some video evidence is even better. Hopefully other witnesses will provide strong statements to back you up. I've had just one instance where I thought something like this might happen, fortunately there was heavy traffic so I was able to keep several cars between us. I didn't have the presence of mind to pull out my phone and start recording though.
Good luck.