The helicopter was cruising at 200 feet above ground level whilst the pilot searched for a vehicle that he wished to rendezvous with. Having sighted the vehicle coming towards him from the right front quarter, the pilot decided that rather than conducting a fly-past to attract the driver's attention he could achieve the same result by landing the aircraft beside the road and in front of the vehicle. To achieve this the pilot placed the helicopter in a hard right turn and entered a steep descent. As the helicopter rolled out of the turn the pilot realised that he had insufficient height available to completely arrest the descent before impact. Although the pilot's attempt to cushion the landing was partly successful, the aircraft touched down heavily and somersaulted.