Looked like target fixation. Probably got on the brakes in the turn, saw the thing he didn't want to hit, and couldn't get off the brakes and re-establish the turn (which is a pretty hard thing to do once your brain locks on something) before he got off the pavement.
It happens, especially to newer riders or riders on unfamiliar bikes. I did it (but was fortunate that time to be able to ride it back out of the grass and back onto the road).
Nate, I did a buy back from the dead for my own Uly from the insurance company of the person that hit me. It was a hassle, and you end up with rebuilt title (as opposed to normal title), but it is all very doable.
In my case, I had to take my title to the DMV, and have them change it to "salvage title". I then sent a copy of that new title with that status shown to the insurance company. They then sent me a check for the difference between the replacement value of the bike, and the salvage buyback price.
This was USAA, and they were very fair with me. Not overpaying, but not screwing me either. I had an unresolved medical settlement still pending, and I made clear to them that if they try and screw me on the bike settlement I will be much more likely to involve a lawyer in the medical settlement, but I don't know if that was a factor or not.
After getting the salvage title, I had to fix everything, keep receipts, then take the bike and receipts up to the State Highway Patrol garage with some form. They inspected the bike repairs and the bike and made copies of the receipts, and signed the form. I could then take that form back to the DMV and get the salvage title changed into a rebuilt title, which works like a normal title but with a scarlet letter on it for future buyers (fair enough IMHO, they have a right to know). The bike will forever be "rebuilt".
This was all Ohio. I'm sure it varies state to state.