There's really not a lot to explain about unicycle polo. It's polo played with unicycles instead of horses. But I think we should all take a moment to think about the people who ride unicycles. I don't know anyone who rides unicycles. But whenever I see someone riding one I immediately think, "Awww, look at that poor person with low self-esteem who feels the need to call attention to himself in the most pathetic way possible." And then I never ever think about unicycles ever again.
Only slightly cooler than unicycle polio.