What is wrong w/that man? I can't even imagine sitting in a car and having a bunch of people come out of a house and just stand there and watch me sitting in a car. That is just so crazy. I am glad you have people there when this happened and made a recording. This could be considered stalking. He is just plain stupid to do something like this in this day and age.
I do hope you have a security system in your home. Be sure to walk around your vehicle and home periodically to make sure that he's not tampered with anything. This is just plain creepy.
Please take care of yourself.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.