It's a pretty violent fall and tumble. It looks like a mechanical failure, or debris on the track caused him to lose it.
Very unfortunate and imho not exactly "funny".
He's lucky to have lowsided instead of high siding... looks like maybe he leaned too far over and started dragging something other than knee... or could have slid on something on the track.
Was the rider OK?
__________________ Like a boy - but BETTER!
2005 Subaru Forester 2.5X
2005 Suzuki SV650S
1997 Honda Civic EX Coupe
1995 Diamondback Sorrento (out of retirement and on the trails!)
rider falls off his bike... funny
