With the Winnipeg Jets and Nashville Predators both losing the night before, it was a massive opportunity for the Flames to pull to within two points of the final playoff spot with an even number of games played.
Instead, they let it slip.
That, in itself, is enough to put anyone in a foul mood. But it's not necessarily the result that stings the most - it's more about how it looked for the duration of Monday's lopsided affair.
"It was a bit of a shock, obviously," Coleman said, reflecting on a rare night where the Flames were outshot 40-17. "Nobody's happy, nobody's feeling like the played a good game last night.
"It's really on the individuals. You can say what you want about the team, but at the end of the day, you've got to look in the mirror and be happy with yourself and the way you performed. I know I'm not happy with my game and I know I'll be a lot better tonight.
"And I'm hoping every guy on this team will say the same tonight."
Mikael Backlund echoed Coleman's thoughts, adding that the C of Red deserves better than what the Flames put on the table last night.
"We're going to have to be a desperate team tonight and show that we're still in it and we want to be there - show it to ourselves and to all the fans out there that I'm sure are pretty frustrated with how we've played this year," he said.
"We've got to show ourselves - and everyone supporting us - that we can be better.
"No one on our team is happy about last night. We've got to use that frustration and anger - however guys feel - use it in a positive way, be ready to go and go all-out tonight."