John Mousinho hailed Portsmouth's “remarkable achievement” after the come-from-behind 3-2 win over Barnsley at Fratton Park secured the League One title and promotion to the Championship.
Pompey looked to be missing their opportunity in front of their own fans when, needing one point to return to the second tier after a 12-year absence, they were 2-1 behind after Devante Cole and John McAtee struck either side of Kusini Yengi's equaliser.
But the hosts hit back in the final seven minutes with Colby Bishop scoring from the penalty spot and Conor Shaughnessy heading home the winner.
Mousinho told BBC Radio Solent Sport: “I think once everything settles down it will sink in properly. I've never experienced anything like that, the last 15 minutes, it was absolutely incredible.
“Even at 2-1 down, to get the momentum and the crowd behind us, I am just so proud of the boys. I'm genuinely just so pleased for everyone connected to the football club. They've gone through so much.
“When we got it back to 3-2 I thought we have played so poor, but found a way to win somehow in a game where we really struggled. It really does sum up the boys.
“A tough night, tough conditions, but they got the job done. It's hard for me to sum it up, but I get what's happened over the last 15 years at the club and how difficult it was, on the brink of liquidation, to come back and have a night like this is incredible to be involved in.
“To be head coach, it is a privilege. Hopefully we can have a few more nights like this.
“I never could have imagined this happening this quickly. This was obviously the goal at some point, but didn't think it would happen with two games to go this season. It is a remarkable achievement. That is a serious effort to be crowned champions ahead of some of the big boys in this league as well.”
Play-off chasing Barnsley, having lost three of their last four games, are four points above seventh-placed Lincoln.
Boss Neill Collins told the club's official website: “There are a lot of positives. But the biggest frustration is that all those positives didn't add up to what I thought would be a deserved victory.
“We perform like that, we'll be fine. We'll win games. It's just the fine margins. For me, it's the fine margins that have gone against us the past four or five games.
“Tonight again, it's some of our doing. But that's what we need to concentrate on. That's what the Football League is all about.”
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