its these times when its good to have a hand full of nuts and bolts in the door pocket, get in front and wind down the window, you can guess where this is going lol.
I once many years ago had a guy run me off the road, I chased him down and forced him to stop, stupid plank left his window open as I walked up to his car, I reached in, grabbed his keys and thrw them in the near by corn field, calmly turned around and walked back to my car and drove off. Again this kind of behaviour is not good.