Valentino Rossi was gifted victory in the Czech MotoGP after Casey Stoner crashed when he was comfortably ahead.
Rossi extended his championship lead over Stoner to 50 points with the win.
Reigning world champion Stoner was one second clear of Rossi when, under no particular pressure, he skidded into the gravel on lap six.
His Ducati was too badly damaged for him to continue and Rossi went on to win, ahead of Toni Elias in second and Loris Capirossi in third.
Afterwards, Stoner told BBC Sport he was not quite sure what had happened.
"You know as much as I do," he said. "The bike was moving round quite a bit but that one just caught me out. No excuses, no nothing - it just caught me out."
He also hinted at having almost given up hope of defending his world title after having lost out to Rossi for the second race in a row. BBC Sport Report
Whos to say Rossi wouldnt have caught him over the course of the race anyway hahahaha
No, is a shame to lose a race in such a way, if it was down to a fantastic dicing battle between the two, like it nearly always is in Moto GP, then thats fantastic. Unlucky Casey...