Good to hear you are safe and were not ran over by a careless driver. But as a fellow motorcycle rider to another, we got to keep it cool. Maybe he did not see you through his diesel black-smoke spewing Westfalia.
Getting in front of him and slowing down, not a very safe practice. Please read the following article.
http://www.venturacountystar.com/news/2009/aug/12/details-emerge-in-fatal-collision/