During an aborted takeoff, the pilot lost directional control of the A/C. The A/C exited the runway, breached the perimeter fence and tumbled down an embankment. The A/C suffered substantial damage. Engine mostly undamaged (crank dialled at .008"), one propeller blade broken off, engine almost broken free from firewall, tail almost broken off. Wings (with tanks + flt ctrls), avionics and seat backs/cushions went to owner.