San Fermin festival 2015

A flaming fake bull known as a "Toro de fuego" runs after revelers during the 2015 San Fermin fiestas in Pamplona, Spain, on July 6. Revelers from around the world turned out to kick off the festival with a messy party in the Pamplona town square, one day before the first of eight days of the running of the bulls. (Andres Kudacki/Associated Press)

Revelers sing while the band plays after the launch of the 'Chupinazo' rocket, to celebrate the official opening of the San Fermin fiestas on July 6. (Daniel Ochoa de Olza/Associated Press)

Revelers open their mouths as they wait to cool off with water thrown from a balcony to celebrate the official opening on June 6. (Andres Kudacki/Associated Press)

Revelers celebrate on the City Hall Square after the firing of the 'Chupinazo' rocket which marked the official beginning of the Fiestas de San Fermin in Pamplona. The festival, locally known as Sanfermines, is held annually in commemoration of the city's patron saint. Hundreds of thousands of visitors from all over the world attend the fiesta. Many of them physically participating in the highlight event, the running of the bulls, where they attempt to outrun the bulls along a 825 meter route through the narrow streets of the old city. (Jesus Diges/EPA)

Revelers hold up traditional red scarves during the start of the San Fermin festival in Pamplona on July 6. (Eloy Alonso/Reuters)

Participants run during the first "encierro" (bull-run) of the San Fermin festival in Pamplona on July 7. The festival is a symbol of Spanish culture that attracts thousands of tourists to watch the bull runs despite heavy condemnation from animal rights groups. (Cesar Manso/AFP/Getty Images)

Revelers run with the Tajo and the Reina's fighting bulls entering Estafeta street during the third day of the San Fermin running of the bulls festival on July 8. 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. (David Ramos/Getty Images)

A Jandilla bull charges at a participant during the first "encierro" (bull-run) of the San Fermin festival on July 7. (Ander Gillenea/AFP/Getty Images)

n this slow shutter speed picture, revelers run with a Jandilla's ranch fighting bull during the running of the bulls on July 7. Revelers from around the world turned out here to kick off the festival with a messy party in the Pamplona town square, one day before the first of eight days of the running of the bulls. (Daniel Ochoa de Olza/Associated Press)

An unidentified runner gestures while being attended by medical services following the first running of the bulls on July 7. Two runners were gored in the run with Jandilla bulls that lasted 2 minutes and 23 seconds, according to local media. (Eloy Alonso/Reuters)

A wild cow, or 'vaca', leaps over participants as it enters the bullring during the Fiesta de San Fermin in Pamplona on July 8 at the conclusion of the second, encierro, or running with the bulls. At the end of each of the event's eight encierros, wild cows are let loose in the bullring for people to try their luck with, resulting in many tumbles and some minor injuries. (Jim Hollander/EPA)

Spanish bullfighters leave the chapel before a bullfight of the San Fermin festival in Pamplona, Spain, on July 7. Revelers from around the world arrive in Pamplona every year to take part on some of the eight days of the running of the bulls. (Daniel Ochoa de Olza/Associated Press)

Revelers 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. (David Ramos/Getty Images)

Spanish bullfighter Pepe Moral aims his sword before killing a Jandilla ranch fighting bull with it during a bullfight of the San Fermin festival in Pamplona on July 7. (Daniel Ochoa de Olza/Associated Press)

A reveler is tossed by a cow during a celebration held at the bullring after the running of the bulls of the San Fermin festival on July 7. (Daniel Ochoa de Olza/Associated Press)

Spanish bullfighter Pepe Moral performs with a Jandilla ranch fighting bull during a bullfight in Pamplona on July

Spanish bullfighter Alberto Lopez Simon is carried by the shouders of his supporters after his performance in the third bullfight during the Fiesta de San Fermin on July 7. (Jesus Diges/EPA)

People watch as Jandilla fighting bulls and revelers run during the running of the bulls, at the San Fermin festival, in Pamplona, Spain, on July 7. Revelers from around the world arrive to Pamplona every year to take part in some of the eight days of the running of the bulls. (Andres Kudacki/Associated Press)

A man works the strings of a puppet depicting British singer Amy Winehouse at the San Fermin festival on July 7. (Vincent West/Reuters)

Men dressed in traditional attire take part in a procession in honor of San Fermin on the saint's day at the San Fermin festival on July 7. A statue dating from the fifteenth century is paraded through the streets of the town in honor of the patron saint of Navarra and first bishop of Pamplona, and "Jotas" are sung and played in his honor. San Fermin is believed to protect the hundreds of runners that participate in the running of the bulls. (Susana Vera/Reuters)

A member of the San Fermin Comparsa Giant Parade touches a hands of one of the giants at the San Fermin festivalon July 7. (Alvaro Barrientos/Associated Press)

Revelers enjoy the atmosphere during the kiliki mannequin parade as part of the second day of the San Fermin running of the bulls on July 7. (David Ramos/Getty Images)

A woman cools off with a fan on a hot day during the San Fermin festival, in Pamplona on July 7. (Alvaro Barrientos/Associated Press)

People enjoy a lunch in a street during the San Fermin festival in Pamplona on July 7. (Cesar Manso/AFP/Getty Images)

reveler sleeps on a public park during the opening day or 'Chupinazo' of the San Ferminrunning of the bulls fiesta on July 6. 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. (David Ramos/Getty Images)