Bruins fans were already in a good mood, and why not?

The B's were playing tough and playing hard in the second period of the second game of the Eastern Conference finals against the Tampa Bay Lightning last night at the Garden, and, more importantly, they were holding tight to a one-goal lead.

But now, with 3:57 remaining in the period, everyone was standing, applauding, screaming.

And yelling out that name.

Seguin.

Tyler Seguin.

For days and days, Bruins fans had been burning up the airwaves with what they believed to be a common-sense remedy for what ailed the team's corpses-r-us power play. Throw in the kid!

And now, with 3:57 remaining in the second, the Bruins on the dreaded power play, the action moving toward the Tampa Bay end, the lines changing up, the gate to the bench swung open .?.?. open, perhaps, to a new era.

Seguin, spectacularly talented but still just a slender, learning-on-the-fly 19-year-old, hadn't even dressed for the first two rounds of the playoffs. He only dressed for Game 1 of this series because the concussed Patrice Bergeron could not. Even so, an eye-popping goal in Game 1, one in which Seguin seemed to skate right through the Bolts' Mike Lundin, could not convince Bruins coach Claude Julien to give the kid a hall pass to the power play.

And then it happened. Last night, in the second period of the second game, a game in which the Bruins would emerge with a 6-5 victory, thanks largely to Seguin.

Say what?

Seguin.

Tyler Time.

The kid had already scored two goals in the period. One of them was yet another beauty, a backhander past Tampa Bay goaltender Dwayne Roloson after he had gone zero-to-60 in the neutral zone and eased past two defenders. The other was the completion of a 2-on-1 when he connected on Nathan Horton's pass.