What happens that makes travis say that the Chongo was suddenly the silliest looking bull you ever saw in the book Old Yeller?

In "Old Yeller," Travis observes the Chongo, a bull that he had previously seen as intimidating and fierce, during a moment when it is startled or behaving unexpectedly. This sudden shift in the bull's demeanor makes it appear comical and foolish, contrasting with its usual fierce reputation. Travis's realization highlights the juxtaposition between the bull's imposing presence and its momentary silliness, bringing a light-hearted moment to the story.