Got a karma one this morning. 10:20 am southbound 400. Black sedan with a sexually suggestive bumper sticker goes wailing past in one of the middle lanes, I'm in the right lane. The car dives over to the leftmost lane to brake check a grey sedan. Grey sedan moves right and the black car does the same. They do this a couple of times and the grey car "gets away". Lots of cars on the road. Black car goes weaving in and out of traffic like an idiot trying to catch/block the grey car. I'm thinking to myself this guy is gonna cause an accident and I'm staying to the right. Couple of minutes later I see a big cloud of dust at the solid median barrier ahead. As I get by the black car is nose into the median and the back end sticking into the left lane. Karma. Just past him a few cars have pulled over and lastly possibly the gray car and the driver exiting(guy about late middle age graying) looking at his car at damage maybe. Wish I had a camera rolling.