OK I was going to stay out of this but let me recap:

You have a high end Ducati following 2 street bikes and 2 dirt bikes and this fat *** clown is bringing up the rear and then locks up the front wheel when he wasn't even bent over!!!!.....Good Grief

 

yeah it looks like to me that he was riding faster than his cognition should have allowed, like how fast he came around the previous curve in relation to the slow bikes ahead(he wasn't even visible when they moved the camera); and the fact that he just slammed on the binders locked up the front. Target fixation, panic, too much speed, distraction by spectators or the bikes ahead of him, whatever; he def wasn't looking far enough ahead to do what was necessary to accommodate that particular turn. At least he was able to get up and walk away thankfully.