Roy Horn always favored big cats. He put them in all of his acts. But then Manticore, who thought Roy was a bore, said βEnoughβ and then Roy was just snacks.
Sorry, I think making wild animals do tricks is not entertainment. Someone who witnessed the scene was interviewed on tv and said that Horn tried to get the tiger to do something, the tiger misunderstood, Roy reprimanded it and "the tiger said "Enough of this." It was the best tv quote ever.