How is that "Insane"?
Consider the post-game party: Winners would be whisked off to celebrate with some shapely Mesoamerican ladies with a penchant for body-painting, while the losing team got lead into the back and had their heads chopped off. However, there remains some discrepancy as to who actually got sacrificed: the opposing captain, the opposing players or even the winning team (since they were clearly the greater warriors). Either way, there would be blood.
Oh, and all those decapitated heads? Yeah... They used nine-pound balls for a reason: The entire game was just a warm-up for the post-game party favorite, head-ball.
The back room at Mesoamerican Sports Authority.