A friend, no longer with us saw Harold Johnson display while as a kid in Cleveland. I do not know if this was during the races or at a different venue, but apparently the organizers had put up canvas covering around the outer fence to stop people from watching without paying. Johnson did his stuff and during a pull- out he disappeared behind the canvas and then fireworks lit up. The crowd thought he had crashed and started shouting and generally getting upset, and just about then Johnson did a “Ray Hanna vs Alain de Cadenet” beat- up having flown at low altitude around the field and attacked the public from behind.
T J