Skating along the endline, defenseman Sean Sullivan threw the puck towards the net, desperately hoping for a deflection in front. Instead, the shot kicked off Grumet-Morris’ skate and in with just 5.7 seconds left before the first intermission.

“It happens,” Grumet-Morris said.

But it wouldn’t again.

The Crimson handily killed each of the Terriers’ two subsequent 5-on-4s and owned the ice surrounding Grumet-Morris’ crease, thwarting BU coach Jack Parker’s first stab at 700 wins.

“They’re a very quick team—I don’t know if they were this quick last year,” Parker said. “And they’ve got good size on defense...They did a great job out in front of their goaltender tonight. They were rattled a little bit early on, and then they got their poise back.”

NOTES: Assistant captain Ryan Lannon returned to the lineup last night, one week after injury sidelined him against BC...Sophomore forward Ryan Maki, expected to skate yesterday after practicing on Monday, was scratched, apparently still suffering from the remnants of a chest injury. He will likely dress Friday...The Crimson, which converted on one of its two power plays against the Terriers, improved to 10-of-26 with a man advantage during its current four-game winning streak. Opening the year 0-2-1, Harvard converted on just one of its 17 5-on-4s...Harvard and BU combined for just seven penalties in last night’s contest, despite a renewed emphasis on obstruction enforcement. “It was more like last year than this year,” Parker said.

—Staff writer Timothy J. McGinn can be reached at mcginn@fas.harvard.edu.