Thanks Klaus!
You're right - I had too much speed and didn't blip the throttle enough on the second downshift. As soon as i hit the grass you can see my left foot get on the clutch and my right try to pump the brakes - to no avail!
I was supposed to have the race video up by now, but after 12 hours of uploading (only 2 left to go), we lost power
Hopefully i'll have it by tonight!