My armchair analysis guess is that he might have slipped off the front of the saddle. Unexpected change of weight on his arms made him swerve. I know I've been close to doing it at the end of a race a few times.
They probably wouldn't be too quick to admit that, and the bike looked fine (as far as I could see in the few seconds afterwards). I hope they announce the reason whatever it was though
I thought that or hit his knee on the bars somehow? Either way it was a pretty ragged finish before he crashed.
The cloud of sand as he hit the deck was quite something
My armchair analysis guess is that he might have slipped off the front of the saddle. Unexpected change of weight on his arms made him swerve. I know I've been close to doing it at the end of a race a few times.
They probably wouldn't be too quick to admit that, and the bike looked fine (as far as I could see in the few seconds afterwards). I hope they announce the reason whatever it was though