[jyl]

Obviously goon-like behaviour by some of the bicyclists in that group. I also think Critical Mass goes over the line sometimes.

But what was the driver thinking - if a mass of anything (bicycles, cars, motorcycles, trucks, even pedestrians) is moving down the road and filling all lanes, isn't it common sense to wait until they have passed to pull out into the lane?

Here in Portland, I don't see much reckless/etc behaviour by bicyclists. Occasionally, but much less often than I see with cars. Admittedly there are far more cars than bicycles, so I guess that's expected.