I would say "panic" and floor it, then come to realize you care for the feelings and well being of the BG and back up.....only to "forget" where he/she is and roll em. Sweet....sweet justice.
I actually had someone attack my wife's car with her/me in it and I almost did run them over, however the BG was her dumb half brother and I decided not to at the last second. We did have a nice go around after I got out of the car.