I love the way he lined up on him and got his right foot positiioned to thrust toward him. I couldn't competently comment on what that was, but I know it was nicely done.
It looked like he was removing himself from the situation(not very fast, I know), but he had to keep turning to make sure he didn't get charged from behind.
I hope something like this couldn't get someone in trouble legally. He had almost finished crossing the street.
I would have lined up on him, thrown a soft left to distract him then a hard straight right; temple or jaw.