On August 30, 1998, about 1500 central daylight time, a Hall Revolution Mini 500 homebuilt helicopter, N9GH, registered to an individual, landed hard at Hattiesburg, Mississippi, while on a Title 14 CFR Part 91 personal flight. Visual meteorological conditions prevailed at the time and no flight plan was filed. The airline transport-rated pilot was not injured and the helicopter received substantial damage. The flight was originating at the time of the accident. The pilot stated that as he hovered forward at a brisk walk, he heard the low rotor rpm horn and reduced the collective control. The helicopter descended rapidly and touched down on the "toes" of the skids. The helicopter bounced back into the air and the cyclic control grip separated from the cyclic control stick. The cyclic control stick moved to the full aft position and the main rotor blades contacted the tail boom.