Hi, RollOverPete.
I've seen that page at Vanatta and I suspect that the machine in question is a D11, not a D10 - see twin exhaust stacks. Only the early D10's had twin stacks and that AIN'T an early one.
I don't know how true it is but I was told that it happened at a mine near Kalgoorlie in Western Australia. I was also told that it was driven out of there under its own 'steam' but I find that hard to believe. I suspect that the engine sensor system would not allow it to run in that position due to lack of oil for the pumps to pick up. Especially, I doubt that you would be able to re-start the engine once it had been shut down. I also suspect that if you tried to 'lift' the blade so that you could drive it on down the slope, you would be more likely to bring the rear of the machine right over the top of yourself. Now that would make life interesting for a moment or two.