A bull from the Cebada Gago ranch falls near a runner in 1999.Luis AzanzaThe bulls enter the ring at the end of an encierro in 1999.Runners and bulls collide at an encierro in 1988.Luis Manuel Fernández
Red bandanas are a symbol of Sanfermines.GettyOne of the encierros in 2000.APA bull goring a runner in the seventh encierro in 2000.Luis Azanza
The sixth encierro in 2004.ReutersRunners falling to the ground during an encierro in 2005.Luis AzanzaA bull from the Jandilla ranch making contact with a runner in 2004.ReutersA pile-up at one of the runs in 2013.Reuters
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