Wow! I just relived my accident. Almost the exact same thing happened to me back in November.
My GSA washed out under me, I high sided and flipped the bike several times. I broke the Swing Arm in half just like him and pretty much took everything off the top of my bike just like him. I also had to rebuild the final drive too. He looked like he flipped like I did, sorta diagonally. I think mine broke when the back tire was coming back around and struck the road with the force of the bike pushing it into the dirt. It takes a lot to break a swing arm. Best part
, I walked away just like him.