Such situations are not uncommon. I was surprised when several women told me of similar events.
One had to slam on the brakes, turn off the car, run to the trunk, unlock the trunk, get the pistol out, get back in the car, start the car, endure a nasty game of “chicken” as the offending male came back at her, and wait until he turned around and again came up even with her.
She then pointed the pistol at him, he floored the accelerator, and she never saw him again.
A friend of mine was harassed for about 10 miles down the interstate by an idiot.
Till she picked up the .357 from under the seat and showed it to him.