Thank you for this second by second breakdown of the facts. I’ve never seen anything that so clearly proves that Tensing was dragged, but was after a few seconds able to fire before he was knocked to the ground.
This clearly proves Tensing didn’t “accidently” fire his weapon and most certainly proves that he was assaulted with a deadly weapon.
I watched it several times and didn't see him dragged at any point. It appears that he fired before he fell over.