Runners trip and fall ahead of the bulls blocking the entrance to the bullring during the running of the bulls of the San Fermin festival, in Pamplona, Spain, Saturday, July 13, 2013. A total of 23 people have been injured, two by gorings, as thousands of daredevils raced through the crowded streets of Pamplona in a hair-raising running of the bulls that ended in a crush on Saturday.