Wow!
That is scary!
I would love to know what happened there also. How the blades didnt contact the ground to the front is amazing. Would a sudden gust from the rear cause that much dis-symatry in the rear to cause the disk to move forwrd like that? Did the front of the skids get caught on something on the ground to cause the turning moment?
Will be waiting for the discussion with interest.
Great video...thanks for putting it on.