Actually I remember seing a documentry on bullet "proof" resistant materials a while back. One of the more recent developements in armored glass is a "one way" bullet resistant material. I don't know how effective it is, but this does make the situation seem just a bit more ominous.
I would most likely have sat there and dialed 911, right after I snapped a pic of the moron with my camera phone. I would also most definately press charges.