I saw it live and with the loss of the lid and lack of movement, I suspected immediately that it was fatal - so much so that I turned off and went away from the TV for 10minutes. I loved his style - not gainly by any means, all knees and elbows. He shouldn't have been as good a rider given his stature, but he had the know-how and devil-may-care determination to win, and I loved his Championship win in 250s - I think I saw all the races and loved the way he came from behind that year. I cheered him on from the safety of my armchair while he put it all on the line to entertain, and that he did - in spades.
MotoGP needs characters and Marco certainly was one - I hoped he would have a long career and take over from Rossi as the tifosi's darling.....not to be now, sadly.
RIP