"Bruins fans had to hold their collective breath early in the second, as Patrice Bergeron went into the corner fighting for the puck with Niklas Kronwall and went down after crashing awkwardly into the boards. He skated off the ice, but later came back with just under seven minutes to play in the period. It was later revealed that Bergeron was just "respecting the [concussion] protocol of the league" when he left the bench and was never worried about the incident."
http://www.boston.com/sports/hockey...rom_the_bruins_2-1_loss_to_the_red_wings.html
My heart just about stopped when his head hit the glass. I was sure it was another concussion.
I'm glad Patrice went through the protocol just to be safe. With his history he can't be too careful.