what do they put on bulls to make them buck
Bull riding The bull bucks, rears, kicks, spins, and twists in an effort to throw the rider off. This continues for a number of seconds until the rider bucks off or dismounts after completing the ride. A loud buzzer or whistle announces the completion of an eight-second ride.
Running of the bulls Although the most famous running of the bulls is that of San Fermín,[2] they are held in towns and villages across Spain, Portugal, and in some cities in southern France during the summer. Examples are the bull run of San Sebastián de los Reyes, near Madrid, at the end of August which is the most popular of Spain after Pamplona, the bull run of Cuéllar, considered as the oldest of Spain since there are documents of its existence dating back to 1215, the Highland Capeias of the Raia in Sabugal, Portugal, with horses leading the herd crossing old border passes out of Spain and using the medieval 'Forcåo', or the bull run of Navalcarnero held at night.