A good give-and-go resulted in Debrusk's opener on the power play at 8:03 of the first period before Weber tied the game at 12:41 on a rebound at the side of the internet.
That's when Pastrnak got to work on his seventh profession hat technique.
The NHL's leading goal scorer beat Price with a one-timer on the power play at 14:24 for Boston's 2nd tally on 5 shots.
Marchand made it 3-1 on a bad giveaway by Jeff Petry behind his own internet with 37 seconds staying in the very first-- the winger's 600th NHL point. Rate yielded 3 goals on eight shots in the first.
Pastrnak's objective eight seconds into the 2nd duration sealed Montreal's fate and Bjork offered Boston a 5-1 lead on a breakaway a minute later.
Julien took a timeout and pulled Price from the game-- the first time that has taken place given that Dec. 9, 2017-- however the assault continued.
When he deflected Brandon Carlo's shot past Kinkaid at 9:06 of the 2nd, pastrnak finished his hat technique. Pastrnak has 23 objectives in 24 video games this year.
Coyle made it 7-1 on a one-timer at 8:26 of the third as Canadiens fans left Bell Centre en masse. Heinen added an eighth for Boston with 2:02 left in the video game.
The Bruins are 8-2-1 in their last 11 video games versus Montreal. The groups fulfill once again in Boston on Sunday for the third of four encounters this season.
David Pastrnak scored his second hat trick of the season to give the conference-leading Boston Bruins an 8-1 beatdown over the Montreal Canadiens Tuesday night.
Jake Debrusk, Brad Marchand, Anders Bjork, Charlie Coyle and Danton Heinen also scored for the Bruins (16-3-5), who have won four straight.
Marchand, Coyle, David Krejci and Torey Krug notched 2 helps each while Sean Kuraly had 3.
Captain Shea Weber scored the only objective for the Canadiens (11-8-5), who have lost 5 straight games.
Bruins backup Jaroslav Halak made 36 saves and improved to 6-0-0 versus Carey Price, his former teammate in Montreal.
Price gave up 5 objectives on 11 shots before being drawn in the second duration. Keith Kinkaid stopped 10-of-13 shots in relief.
Boston extended its point streak to eight games (5-0-3) and jumped ahead of Washington atop the Eastern Conference standings.
Claude Julien made no changes to a Canadiens team that blew a four-goal lead and lost 6-5 to the New York Rangers last Saturday.
Price quit six goals on 34 shots to the Rangers and struggled much more versus the Bruins, who were without Patrice Bergeron (lower-body injury).