I've had a similar incident except with some kids in a pick up a while back. They tried to run my girlfriend and me off the road multiple times until I slowed down enough to get their plates and call it in. I yelled at them that I did and they followed me a bit until I sped off on them and got ahead enough for me to pull into my destination. If they had followed me they wouldn't have been very happy if they found out what I had waiting for them. I'm just glad I never leave home without it.