It seems that some revellers at the world-famous San Fermin Running of the Bulls festival in Pamplona had one too many sangrias - and lost all their inhibitions.
Thousands of party-goers crammed into the streets of the northern Spanish town as the nine-day event got under way.
Red wine was thrown through the air in such quantities that the revelers - wearing the traditional uniform of all-white with red neckerchiefs - turned into a sea of pink. And women roared with laughter as they exposed themselves.