BERGA, SPAIN - JUNE 04:  Revelers run away from the 'Guita Gran', big dragon in Catalan, as it emits sparks during the first day of 'La Patum' Festival on June 4, 2015 in Berga, Spain. The Patum festival's roots are found in the theatrical performances of the Middle Ages and is held in the town of Berga each year during the week of Corpus Christi. The event is belived to date from the second half of the 14th century, although the first written reference to the Corpus celebrations in Berga were made in 1454.  (Photo by David Ramos/Getty Images)