With City cruising at 2 - 0 the goal scored by Eddie Johnson was celebrated wildly by all those in the ground (bar the Doncaster supporters).
"It was an excellent moment," beamed Dave Jones.
"And the great thing is that it couldn't have happened to a nicer man.
"You could see by the reaction of everyone, the fans, the players, the staff and Eddie himself, just what it meant.
"Eddie has worked really hard in training and in the last two matches, and this goal was things coming to fruition for him.
"When did you last hear the crowd here almost as one singing the name of one player like they did after he had scored?
"If the crowd see a trier, they will always back him, and Eddie really tries.
"He will probably be voted the Prime Minister of South Wales after this!"
Jones continued: "I have always said that it is not just about my starting XI, but the players who are in reserve too. Eddie had to be ready to make his mark if he came on and that's exactly what he did.
"The way Jay Bothroyd played while he was on the pitch today, you sensed he knew Eddie is right down his neck trying to get his starting spot. I've got two competitive players seeking one position and that's great for me as manager.
"Generally, I thought we were superb today for the first 75 minutes, before closing the game out in the final 15. I didn't want Doncaster getting a goal and giving themselves hope.
"Every player produced for us. Doncaster were the form side of the league away from home, we were the form side at home, so something had to give. Fortunately it was them, not us."
But he concluded: "It still wasn't our best performance of the season. That was when we won at Coventry, but it's certainly up there too."
Doncaster manager Sean O'Driscoll admitted his side were well beaten.
"We didn't start well. Our backline couldn't cope with Jay Bothroyd and Michael Chopra and our frontline couldn't cope with Roger Johnson and Gabor Gyepes, so that gave us problems in midfield. In all areas of the pitch we were below par.
"Once we got over the first ten minutes and went a goal down I thought that there was a period of the game when we controlled it a little bit, but the second goal killed it.
"They have been too long in the Championship, and too battle hardened, to lose the game at that stage.
"I don't think that anybody who was 2-0 down at half-time at Cardiff would expect to come back and win the game.
"The first goal in the second half always makes a difference but even if we had have got it I still think that they would have run out winners.
"We've got beaten before but on a lot of those occasions people have said how well we've played, but we just didn't turn up today.
"We didn't see it coming. Sometimes you have an inkling in the week in training, but that wasn't the case.
"We lost Paul Heffernan with a virus this morning and Brian Stock shouldn't have started. He was struggling with his back and he had a couple of jabs in it.
"He's an important player and we took a chance and hoped it would ease up but it didn't happen.
"Those two things upset us a little bit but we've no excuses."