A human tower of the team "Colla Vella Xiquets de Valls" collapses during the "XXVII Concurs de Castells de Tarragona", in Spain, one of the biggest human tower competition in the world. During the event each team builds towers between six and ten levels high. Human towers have become one of the most important cultural traditions in Catalonia for more than 200 years: “Strength, balance, courage and common sense” is their motto.