In most motorsports, it's almost a cliche to see a crash unfolding from the car behind it. Here's the view of a motorcycle crash that happens so fast you don't see the bike until its in the air by the driver's head.
The rider says here's what happened:
It was the first race of the SBKs (Swiss Championship and German "second league" - the Championship that comes after IDM.) The crashing rider was OK. He plans to ride IDM this weekend in Hockenheim. Me, I had only a punkture from crunched parts flying around on the right! shoulder (finished second the restart and won next days race). The guy who has to pass the bike left side behind me broke his little toe showing the bones - no crash. And a "normal" crash behind.
H/T to MrQuick!