Not only is the motorcycle rider crazy, there's several cagers that like to cut right in front of you. It reminded the first time I drove in Rome was during afternoon rush hour. Your only concern is the vehicles in front of you.....not to the side or rear and I think signaling is forbidden.
Dang, I thought traffic was crazy around here. As for the rider, if he doesn't care anymore than that for his life, I for one, will not mourn his passing.