The Bairns had played some decent stuff in the first half but weren’t able to find a breakthrough. Instead it would be Airdrie who hit the net first through Kurtis Roberts.
McManus himself got Falkirk back on level terms with just under 20 minutes to spare before a long throw-in fell to the feet of Diamonds attacker Calum Gallagher, who made no mistake with the finish.
It was a disappointing afternoon for Ray McKinnon’s side who have dropped to fourth after this result.
McManus says it’s a hard one to take. Speaking after the match, he said: “It’s never easy losing a game in the last minute, especially one where you feel you should be leaving with three points.
“That’s what happens when you give soft goals away. It doesn’t matter what level you play at, if you give soft goals away, you’re going to concede goals.
“Everybody knows the way Airdrie play. They have big guys at the back who go up for every set piece and throw-in, they just want to get it into the box and challenge.
“It’s soft, it’s switching off. You can’t let a ball bounce about three yards in front of your goal never mind with the last kick of the game.
“We only have ourselves to blame for that and it’s obviously tough to take as apart from three lapses in concentration, we dominated the game. I felt that after I scored we’d be the team to go on and win it, but unfortunately we’ve been a bit soft.”