Buzkashi, Kökbörü or Oglak-Tartis (Persian: بزکشی bozkæšī, Tajik: бузкашӣ buzkašī: goat grabbing) (Uzbek, Tatar, Turkmen: kökbörü, kök "blue" + börü "wolf", Kazakh: көкпар kökpar, Kyrgyz: улак-тартыш ulak-tartyš) is a traditional Central Asian team sport played on horseback. (See Wikipedia.)
It is a popular sport all over Central Asia, and has been adopted as "polo" in some other parts of the world.
One of the differences between the Central Asian and the Western versions of the game is that in the West, you use a ball and a club, while in the East, you use a dead goat or sheep and your bare hands. Certainly this shows that Central Asian men are just tougher.
(Those who think using a dead goat or sheep is somehow terrible might want to consider whose hide your average leather football is made of. At least the goats and sheep have not been manufactured in sweatshops using underpaid child labour.)
Here, I'll focus on photos of Ulak-Tartysh as it is played in Kyrgyzstan. (I was, of course, researching for this post when I came across the guys in the post below ...)
Christopher Herwig has photographed a game of Ulak-Tartysh at a hippodrome outside Bishkek. Here is the whole set and his description at Flickr. Highlights (click for full size):
The players are wearing hockey helmets, or no helmets at all. The leather variations look like Russian/Soviet tank soldier helmets, but are actually old-style leather hockey helmets (our dad used to have helmets like that at some point).
Some particularly cute guys grabbing the goat, photographed by Jonathan Wilson at Trekearth.com (click for full size):
Ronald de Hommel has a quite interesting website with photoreportages from many parts of the world. While in Kyrgyzstan, he also covered Ulak-Tartysh:
The doggies also participate.