I've survived over 2 years in Sydney traffic putting up with thumb-up-bum f^&*witters and only surviving through a little bit of luck and a hell of a lot of defensive riding. So having had two near misses(merged into and not-giving way at a roundabout) in about 5 minutes, when the third truly bloody-minded and negligent incident happened, two years worth of restraint went out the window. Riding along at 60 kph in a 60 on a wide open straight section with a car on a side street on the other side of the road waiting to turn into my lane. But he had traffic coming the other way so it looked safe. Was still watching him like a hawk and just as well because he gunned it to get through the 3 car length gap in the opposite direction traffic without even looking for traffic in my lane. I was hard on the brakes as soon as he moved which was the only reason why I didn't hit him. I was so livid that I thought "this f^&*ing a-hole really deserves this" so I split up his left side and slammed my fist down ontop his mirror. I heard a loud bang but I don't know if it broke anything as I didn't bother looking back as I split through traffic to get some vehicles between him and me. Given this constitutes criminal damage hopefully I will never be brought to doing this again but I'm not holding my breath.