Dude, I had a similar thing happen in May, (read my old posts) I had to stop quick (my fault), hit the rear brake and within a half second the bike was out from under me. With yours and other posts I’ve read I wonder if the rear brakes are of a bad design and lock up too easily?! As for damage, mine looked like $500-$800-ended up $3900 with less wrong sounding then yours, you may be totaled? Of course glad you are not hurt more. I too kept thinking I was badly at fault but now believe that the brakes are too touchy to the tune of wanting a few air bubbles in the rear to soften up the response ( a bit extreme for sure) , but I am afraid to use the rears at all now. Hope input useful.
