Amusing footage shows locals taking part in boxing matches while balancing on a pole over a river.
The activity, known locally as 'sea boxing' or Muay Thalay, was held yesterday (January 27) in Phayao Province, northern Thailand.
Competitors have to edge forward along the bamboo beam then punch their opponent until they fall into the water.
Footage shows the Muay Thai boxing enthusiasts, a fun variation of the country's national sport, wear boxing gloves and life jackets as they compete against each other.
People are eliminated over several rounds until the last person to have stayed dry is declared the winner.
The annual water sports festival also sees locals stage rowing boat races and colourful dances on the Kwan Phayao lake.