Sidney Crosby had a broken foot for the last month of the regular season. See the Post-Gazette article here (though I'm not terribly impressed with it) and the Trib article here (much better article).
This is just more icing on the respect cake. Crosby sets the tone for this team. The fact that he was able to kick it up several notches in the playoffs despite the problems with the foot is amazing. Remember when Kovalev played with a broken foot? Nothing close to this... but to be fair, we can't really compare the injuries.
Sid will miss the World Championships as a result of the injury.