Scary! Does your enighbors know? I would tell them so that they can keep an eye open for you too. they need to know for their own safety as well. Its always better when more than one set of eyes are on the lookout.

We had a similar incident the other day - some guy followed us in hois car because we beeped hm when he ran a stop sign. I had my cell phone dialled to 911 and was ready to hit dial when he decided to race off.