No Marquess of Queensberry rules here ... This is Dembe, a brutal and sometimes deadly Nigerian boxing:
"Before the bout starts, the boxer will wet the flax cord wrapped around his hand and cover it in sand to maximize the pain he can infict. Wrapped inside his fist are small animal skin packets containing bird feathers or other charms the boxer believes protect him."
BBC News has a fascinating photo gallery of the sport: Link - via Look at This
Is this any more deadly than Extreme Sports in the USA?