Coach gets attacked by punk asses during a baseball game:

http://sportsillustrated.cnn.com/baseball/news/2002/09/19/royals_whitesox_ap/index.html?cnn=yes

Ya see, the coach should have studied under Ashida Kim, as his ninja senses would have told him about the attack before it happened and he could have thrown some infield dirt in their eyes.
Dirt, the ultimate self-defense strategy.