thanks everyone...
still a bit shaken up... believe it or not the most terrifying part of it all was him going for me...
not the summersault over the bars, landing on my face and sliding... I accept things like that could happen riding a bike but the guy going nuts was just unbelievable...
theres issues with the bike - dvla have screwed up the ownership docs so theyre now looking at it to make sure its not a ringer before I can get it back

just very glad it was the cbr and not the SV