You could've offered to buy the guy in the Volks a Happy Meal to help him relax ;f
Kidding aside, I'm glad you and your wife got through that situation all right. De-escalating and leaving the situation was a good judgment call on your part.
But tell me, is road rage prevalent in the US, and did you subsequently report the guy to the police? He did, after all, come at you with a baseball bat.