The latest example occurred Saturday night, when Evander Kane of the Atlanta Thrashers knocked out Pittsburgh Penguins agitator Matt Cooke cold. Kane destroyed Cooke with his first punch, a right that landed flush on Cooke's face.
Thanks to Kane holding on to Cooke's jersey for leverage in the fight, Cooke landed softly on the ice. The linesmen immediately called for the Penguins' trainers, who tended to Cooke before a stretcher was brought on to the ice.
Upon seeing the stretcher, Cooke waved it off and skated to the Penguins locker room at Philips Arena under his own power.
The Penguins, who play their season finale on Sunday on Long Island before beginning defense of the Stanley Cup, said Cooke would be out of the rest of Saturday's game for precautionary reasons.