I had a similar circumstance and I got a broken windshield for my trouble just trying to be a good samaritan.. I was @ local grease joint back when I used too eat garbage food 24/7, but the story goes like this..
This fuckin place was 1 of those places where your damned if you do and damned if you don't, (translation) if you went inside this place and ordered you'd be in danger of being a / the victim of a mugging, robbery, or just a victim, so the other choice was to go through the drive-thru which was a death-trap sort of speak, if you got jacked (there was no way to swerve out and escape) cuz the DRIVE THRU was a one lane behind the restaurant until you went all the way around the building.
So one night, I went to this place and there was a broken bottle in the lane right before you pull up to the ordering box, so I put my truck in neutral and get out and go move the broken bottle, while I was doing that, once you get around the (back) of the building, you can pull away in another lane, but this A$$HOLE behind me swerves around me and goes to order in front of me, so I order then I told the guys @ the ordering window to tell the guy who just ordered in front of me, that I saved him from a flat tire and that he didn't have to cut in front of me as I was doing him a favor, so this DRUNK/HIGH FUCKTARD gets out of his car starts cussing @ me and throws a a bottle @ my windshield and breaks it!!
Needless to say, the only justice I got, was that he paid for his food and never got it cuz he sped off after he broke my window.. I wish I had my gun with me back then!! I would have been aiming @ his tires then I would have shot out all of his windows!! of course I would not be shooting @ him, but I sure as fuck would have been shooting his car up... wow that turned out too be a long story to explain and type!!