Cardiff made a first half tactical substitution that saw the ineffective Peter Whittingham substituted for Wilfried Zaha. Whittingham endured a mixed crowd reaction as he left the pitch to a mixture of boos and applause - the applause for the managers decision more than for the player.
The reaction shocked Craig Bellamy (pictured telling the crowd to shhh) who said afterwards
"I haven't heard the crowd like that. That's not the club I'm from. I saw them turn first half, and I've not been a part of that. I've not seen them direct it at individuals, which they did."
The boss explained his thinking
"Sometimes you just have to make decisions and do what you think is right," said Ole Gunnar Solskjaer.
"I felt it was right to bring Wilf on, it lifted the crowd and the players. We needed a lift. It could have been anyone I took off, but I didn't have too many doubts.
"It maybe frightened the Norwich defenders because he is such a great and exciting talent.
"Going forward, he is one of the best I've seen. Defensively, I've got a few hours teaching ahead of me. But he's a young lad and you want him to give us what he can do.
"That's what he can do - lift us like he did today. It was a great debut."
Chris Hughton could not believe his side had slipped to defeat.
"I am wondering how we got nothing out of the game," he said.
"We conceded two very poor goals in a game where I felt we were comfortable enough in the first half as the away side, and if our final pass had been better we might have been able to get another goal.
"At 1-0 we were comfortable but to give away the two goals we did, at the time we did, changes the atmosphere in the stadium.
"The crowd were fairly quiet in that first half and that was down to the effect we had on the game.
"For a side that had taken a knock like that we responded very well, but their goalkeeper, as he did at Carrow Road, made some super saves.
"We also hit the woodwork a couple of times and had a couple of goals disallowed. So I cannot fault the desire and effort of the players to get the goals and we missed some chances, but how we did not win that game I do not know."