The intensity of last week's do-or-die Game 7 between the Bruins and the Montreal Canadiens was thick enough to cut with a knife. That didn't mean Tuukka Rask, the B's backup goaltender, still couldn't enjoy a light moment. A deflected puck headed toward the bench area at the Garden and Rask made like a fan at a baseball game, stabbing out with his glove to catch it. The puck stayed in play, and those who might have been questioning if Rask was paying attention while Tim Thomas starts every game this postseason run had an answer. "You can't get too intense. It's a Game 7, yeah, but you've got to have fun and go with it," Rask said yesterday from inside the visitors dressing room at the Wells Fargo Center, where the Bruins played Game 2 of their Eastern Conference semifinal series with the Philadelphia Flyers last night. It's a different life for Rask right now compared to last year's playoffs, when he was the No. 1 goalie and Thomas had to watch the then-rookie face the Buffalo Sabres and then Philadelphia. Rask's sophomore year didn't go as planned, but he still put up respectable numbers (2.67 goals-against average, .918 save percentage in 29 appearances). That's a big reason he's been able to stay upbeat during practices and on the bench during games.