One of the many star turns at the Cultural Day was the appearance of the Asaro Mudmen from the Eastern Highlands of Papua New Guinea.
According to the legend, the men of Araso went to war against a neighbouring tribe and were defeated. As they made their hasty escape they came to the Asaro River where they decided to hide overnight in the mudflats on the edge of the river.
When they got up in the morning, their enemies who had been waiting all night, saw them rising up from the mud and thought that they were evil spirits. They fled in fear and trembling.
Realising their tactical advantage, the Araso men daubed themselves in mud for all future battles. However, because the mud of the Asaro River was believed to be poisonous, they fashioned elaborate masks to keep the mud off their faces and to strike further terror into the hearts of their poor benighted neighbours.
http://www.youtube.com/watch?v=pShMm8wymFM might be interesting.