My untrained eye thinks it sees ground resonance develope there, and I can certainly appreciate how that could wiggle the helicopter off the side of the dolly, beyond the control of the pilot.
Mine too. Easy to say from here, but perhaps an early hop back up was the answer when it first kicked? Watch it over at full size in Real Player... looks like he lifted off with a lot of left pedal on. You can see what he's doing with the stick too.
Just glad I've not got near to doing this... yet
