BOSTON – Some nights are emotional, come-from-behind efforts full of hope and energy that the Bruins have turned a corner, and then others are like Thursday night’s slog against the Colorado Avalanche.

The majority of the Bruins simply didn’t show up to start the game, and most of them never really fully showed up in a 4-2 loss to the Avalanche at TD Garden that snapped a 4-0-2 stretch of games with points for the Black and Gold.

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It all started with 4-on-4 play during the first period when Matt Duchene was allowed way too much time and space in the offensive zone, and hammered a shot past Anton Khudobin while all alone in the slot. Seven minutes later the Bruins power play was leaking oil all over the ice, and Torey Krug laid out for a puck at the blue line while he couldn’t keep possession. Instead Nathan MacKinnon beat him in a race down the ice and buried a shot past Khudobin to give Colorado a commanding, early 2-0 lead over Boston.

A John Mitchell score on a short side wrist shot off the rush to makes it a 3-0 advantage, and that’s when things turned into the David Pastrnak Show.

The 20-year-old scored a pair of goals to get the Bruins back into the game, electrify the crowd and give Pastrnak an amazing 18 goals scored in 23 games this season. The first was a breakaway after a long stretch pass from Tim Schaller connected with the dangerous Pastrnak, and the second was a bazooka one-timer off a Brad Marchand feed from the corner.

Unfortunately the Bruins couldn’t hold onto that momentum while playing at their lollygagging pace for the night, and allowed a late Carl Soderberg score late in the second period that wiped out all of their momentum.

It was a rough night all-around, and that goes for Khudobin as well while allowing four goals on 20 shots that dropped his record to 1-4-0 on the season.