What is an odd or out-of-the-ordinary sport you know of?

This is "Single-Bamboo Drifting" (独竹漂), a traditional sport of the Miao peoples in Guizhou.

You stand on a broad bamboo trunk and steer/propel with a thin bamboo stick. Often combining it with complicated dance. It requires a lot more balance than I could ever have managed at any point in my life.