My room mate had a class this morning at the same time I start work, so we both left the same time. I was on my undergeared SS snow MTB and he was on his road racing commuter bike. He is a big show off and cycles dangerously. He was going to turn left to take a different path, and in typical form, took the turn really fast and hard and since the road was covered with slush he went down and his lock fell off his rack and went sliding across the entire road. I stopped and made sure he was alright and then took a nice ride to work on my own. I think I prefer to commute on my own. You can be much more 'self-centred' and go at the excact pace and course you want.