unless there was some fluid of some type on the road, and it doesn't look like it {front would have gone first}, I would say the rear brake locked, whether you are aware of it or not, it looks like you hit the rear brake..It worries me that you say "i have crashed motorcycles at all sorts of speeds", I have been riding for 40 years, had one accident and it wasn't my fault, hit and run, I have done track days {on a FZR1000 and GPX750R} and rode like a lunatic when i was younger, had plenty of scares but only one stack. I still ride fairly hard, just within my limits. I have a favorite ride not far from where i live called Mount Tamborine, very similar to the road you stacked on, it also has some switch backs and blind closing radius corners that keep you focused. I have watched your video a number of times and it looks like you are looking at the bank or road edge {very easy to do} because your line, once you over commit, doesn't change much at all, then it looks like, just as you are about to go off the road side you hit the rear brake and down it goes, believe it or not, that is a very common set of circumstances... I'm glad you are not offended by my observations, that was not the intent...
