I was waiting at a light and got buzzed on the right by a slower cyclist I had passed earlier. He is lucky I did not veer to the right; no verbal anything. He must have thought he was being cool but may not have thought that if he was laying sprawled out on the road. The most dangerous riders are the ones who don't ride enough to have good sense of road safety. I would hazard a guess that they account for a large percentage of bike accidents.