sorry to hear about your mates dude, i've been on the back of bikes since i was 9 (15 years now) and there are sum retarded drivers out there BUT there are some bikers that are just as bad, its the same on both sides, theres sensible drivers who see bikes coming and give them room (me, ) then theres the ones who move over to try n stop the bikes goin past cause they dont like the fact bikes can get through traffic and they're stuck in it, but then theres bikers who are sensible and go fast when the roads are clear and safe, then theres the dickheads who set out to go head down, arse up, flat out all the way, they dont care where they overtake or how close to the cars they get, then bitch when they fall off . hope your mate gets well soon.