From Wikipedia.
Kolanos' career has been limited by a serious concussion after
Václav Varaďa hit him from behind and knocked him unconscious in a game on January 19, 2002. Varada received a major penalty and game misconduct as a result of his actions.
[1]
Perhaps the most memorable moment in Kolanos' NHL career occurred during his rookie season on March 31, 2002 when, despite lingering post-concussion symptoms, he scored a penalty shot goal against all-star
Patrick Roy, after which the now Hall of Famer reacted emotionally and was assessed a 10-minute misconduct and a game misconduct.
[2]