Maybe he did understand the law, but he choose to stop and did not like the bicycle coming from behind him while he was already stopped, not stopping, but instead 'blowing' by him. The point I am seeing is that even if the law says you don't need to, you still should if bicycle ahead of you did choose to, to give the rider who did the right of way.

Now I'm not defending the guy, he sure seems uptight by the description, but just trying to see if from his perspective.

Al