Buzkashi is the national sport of Afghanistan.
Mousa shows John Rambo what the Mujhaideen do for fun. When they don't fight, which is actually quite often, because they don't have many weapons or soldiers and often have to wait long periods for assistance, they spend the time by playing card games and Buzkashi, which he calls "Sheep Ball". Rambo is confused, so Mousa explains that Sheep Ball is similar to American football or polo. It is played by trying to get a sheep or goatskin to a goal while on horseback. Despite never playing it before, Rambo joins the game and picks it up quite quickly, nearly winning. While the players are distracted, Colonel Zaysen uses his gunships to attack the camp, killing almost everyone.