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 The most famous running of the bulls is held during the nine-day festival of Sanfermines in honor of Saint Fermin in Pamplona,[2] although they are also traditionally held in other places such as towns and villages across Spain, Portugal, in some cities in Mexico,[3] and southern France during the summer.