BOZO

[SRW]

Situations like that, I turn around and smile while I'm dialing 911. I make sure him and any other witnesses can hear what I'm doing and why, and that I'm "worried that he might assault me because he's standing here screaming at me now, and he's blocking me from getting into my vehicle." I'll then hang around to get his license plate number, and talk to the "Uniformed Blue" when they arrive.

Might think about walking away from your car at that point, and going to an area where more people are. Hot-heads can be controlled by others pretty effectively.