On Sat, 4 Nov 2017 11:45:42 -0700 (PDT),
wrote:

He violated a basic principle of city cycling, avoid doing anything
that impedes the progress of others or that startles them
unnecessarily.

Unfortunately I see a lot of "urban cyclists" around here not following
that principle. As transportational cycling grows, it appears that the
stupidity formerly seen behind the wheel of cars is now seen on the
saddle of bikes.