Hey, it's not always the other player that causes the injury. With so many projectiles hurling about, so many jumps and twists and acrobatic dives, so much nervous energy and adrenaline coursing through bodies, a sports arena can be as disorienting as a fog-smothered battlefield.
And players take friendly fire. Not only from teammates, but also from themselves.
Click on to see 10 players who gave themselves a royal beaning.