Revellers attempt to avoid a fighting calf inside Pamplona bullring during the second day of the San Fermin Running of the Bulls festival on July 7, 2015 in Pamplona, Spain. The annual Fiesta de San Fermin, made famous by the 1926 novel of US writer Ernest Hemmingway entitled “The Sun Also Rises”, involves the daily running of the bulls through the historic heart of Pamplona to the bull ring. (Photo by David Ramos/Getty Images)
