I am an urban cyclist not only because I think it's fun (and saves money, the environment, etc.) but also because it makes the most sense...indeed it is often quicker--and less stressful--to get from point A to point B by bike in the city. Anyhow, with that in mind, here's a couple short videos. Two different topics and from two different areas of the US; one is filmed in NYC and the other in San Fransisco. If you are a cyclist, and I know many of the readers of this blog are, or even if you are not, you will probably find these interesting. They were embedded from here and here.