[recycled sixtie]

Like Les says you did not cause the accident but the motorbike's lack of visibility did not help and the rider was not being cautious. When I ride my mountain bike I try to avoid traffic as much as possible but the occasional car driver tries to run me over.

Anything that is not readily visible like a Miata is also problematic. When I owned one other drivers simply did not always see me. They sometimes changed lanes as if I was not there. My Boxster seemed to get more respect and seemed more visible. Yes a surprising number of people were traumatized in that one accident you encountered. No blame on your part.