Low level aerobatics have inherent risks:
American team manager Norm DeWitt said Cruse was flying the early-round “Q” program when she lost control of her Zivko Edge 540 aircraft by what appeared to be a mechanical problem in flight. The USA lost one of its most outstanding pilots, and the IAC lost the finest President we have ever had, DeWitt said.”
There’s little margin for error during aerobatic performances and practices, especially if there are control problems at low altitudes with the aircraft. A loss for the Cruse family and the entire aerobatic community.