As an avid watcher of the History Channel with a generally curious nature, I have more than the average familiarity with the American pyramids. In all of that watching and reading though, I never came across the story of chunkey. In case you didn’t know, chunkey was the football/soccer of the pre-European Americas. The game involved teams of two, one with a small disk made from stone, and one with a spear. The first player would roll the stone out onto the field, and the next would try to place the spear as close as possible to the stone. There is a good article on the influence of the game at io9 and you can find more on the game at wikipedia.