A participant gets bucked off his bronco during the 2012 Barstow Rodeo Stampede aboard Marine Corps Logistics Base Barstow, Calif., Sept. 28. Riders compete to see who lasts the longest without being thrown as the broncos buck furiously. - A participant gets bucked off his bronco during the 2012 Barstow Rodeo Stampede aboard Marine Corps Logistics Base Barstow, Calif., Sept. 28. Riders compete to see who lasts the longest without being thrown as the broncos buck furiously.