During a show of rodeo to Waconia in Minnesota, men in huge inflatable bubbles are of use as toy to a bull. The animal does not hesitate to darken in the bubble men to send them to the air. One of the participants makes an impressing jump having been hit by the bull. We could think that the bull has fun, but it is not the case. We can see on the images that he wears a belt tightened around his lower abdomen which presses his urethra. It is what makes the animal kick. The inflatable bubbles, called also zorb ball or Knockerball, are used in the recreational sport called bubble football.