Whoever he was, he was a far better rider than I ever was or will be. Maximum respect to his riding ability and physical courage.
But I do know about public performance, and he forgot three basic rules:
You’re on stage to entertain, not to impress.
If the audience has no idea how difficult it is, they won’t know how good you are, and they won’t forgive your mistakes.
In a short stage performance, never attempt something that you can’t be sure of achieving.
What I saw was a good unicyclist with a bad act. What the crowd saw was a nutter who fell off.
An amateur practises until he can get it right. A professional practises until he can’t get it wrong. Failing to land the impressive (8 foot?) drop at the end was the equivalent of a singer being unable to hit the high note and stopping the song.