Lowering him- self down on the back of a 2,000-pound irate bull then holding on for eight seconds before jumping off and scrambling away. Bull riders say there is nothing like the adrenaline rush when the gate opens and the bull charges out. Saturday night at the Co- lumbus Saddle Club Arena 24 young men, climbed aboard hoping to stay on the bull’s back for eight seconds. Quincy McDon- ald, out of…