The Bruins have shown they can win under all types of circumstances this season. Defensive struggles. Hard-hitting games and Thursday night, they showed they can win games that start out as blowouts and turn into shootouts. The Bruins led 5-1 after just 4 1/2 minutes into the second period when the pesky Toronto Maple Leafs  collectively said, ‘Not so fast.’ After all was said and done, eight goals had been scored in the second period alone, with Phil Kessel  collecting two. But the star of the game was David Krejci , netting his first career hat trick, including a goal in the third period that sealed the deal. The Bruins extended their home winning streak to 12 games, their longest since 1976 and the fifth-longest in team history.