"You can't turn back,'' said Calgary coach Glen Gulutzan of the winning goal. "You can't turn back with three minutes left. You've gotta play forward.
"We needed to get points. We needed to take that into overtime. We're good 3-on-3. So we can't turn back."
The 3-2 loss ends a four-game run of points for the Flames.
Old bugaboos crept back into their game, particularly during the middle stanza. Uneven play at home. Turnovers. Powerplay woes - zero-for-three Thursday, including a 38-second 5-on-3, makes the Flames 2-for-their-last 32 holding a man advantage.
"You don't lose the game on one play,'' reminded captain Mark Giordano. "There's a lot of things we've got to sharpen up. No. 1, our powerplay's not going right now. Special teams again.
"We gave them one. And we didn't get any. We've got to clean it up.
"Pretty even game. They had chances. But we had our chances, too. And then we give them one with, whatever it was, three minutes left. It's tough to recover."
Smith, meanwhile, was miffed at himself.
"If I felt it,'' he said of Donskoi's winner, "I would've covered it. So no, I didn't feel it.
"Tonight, close game, you've gotta be at your best. The second goal is a penalty cause I trip a guy. Then the last goal, it's got to be stopped.
"It's a stoppable puck. Control the puck. So it's on me tonight.
"I had no idea where the puck was, to be honest. I didn't know where it was so I just hoped it was under me somewhere.
"We were in a hockey game tonight, a close one, and in close ones you can't have brain farts. It came back to bite us tonight."