Maple Leafs right wing Colby Armstrong suffered a concussion on Saturday night against the Canucks. Armstrong didn't let the team's medical staff know he was feeling nauseous until Monday afternoon. Toronto didn't have a chance to follow any of the guidelines set out in the NHL's concussion protocol because they were unaware the forward was even experiencing symptoms until almost 48 hours after the collision that caused them. "It took us all by complete shock because we had no idea that he had his bell rung the other night," Leafs coach Ron Wilson said. "He kind of kept that from us."