The number painted on the nose was a give-away clue as to the rego.
I'm still at a loss to believe the helicopter was being operated by a pilot, even a retired one at that. There must have been no intention to take-off and land back on that mobile dolly, given it wasn't chocked. And even if caught by surprise by the thing getting airborne, there was ample opportunity to put it on the ground after entering wobbly mode. That helicopter is totaled, not much to be salvaged from what's left.
Yeah, maybe aft CG had something to do with it. There was a night-sun hanging off the back and the race cowl was off the front. But still.