Birmingham boss Lee Clark was left to lament the loss of two goals and two points in the last 17 minutes as Nottingham Forest bounced back to maintain their unbeaten run this season with a 2-2 draw at the City Ground.
The Blues had curbed Forest's attacking flair in the first hour then struck with goals from Hayden Mullins and former Reds' striker Marlon King.
But Forest were given hope with a wonder goal by Simon Cox and grabbed a point thanks to fellow substitute Dan Harding.
"A point away from home is a good result, particularly against a side of Forest's ability," Clark said.
"But when you are 2-0 up with little over 15 minutes left to play it is very disappointing to have to settle for a point.
"The players were excellent but we were guilty of dropping too deep, giving the initiative to the Forest lads... and they took it.''
Forest boss Sean O'Driscoll was delighted his side showed the qualities to snatch something out of the game.
He said: "I didn't think we deserved to be 2-0 down but you have to give credit to Birmingham. They came with a game plan.
"But it was a good response from us to the situation we found ourselves in. The three substitutes did very well but if you are going to do well in this division you need 16, 17 or 18 players.
"It was important to get the first goal and Simon Cox came up with it. He got a knock on international duty and we thought he might be out for six to eight weeks but there was no break and he was desperately keen to play.''