Rochdale boss John Coleman described his side's 3-2 defeat of Rotherham as tough to watch from the dug-out.
Rochdale grabbed the lead in added time at the end of the first half through the veteran Dele Adebola, but Rotherham equalised on the hour thanks to an Alex Revell bullet header.
They went ahead five minutes later through substitute Daniel Nardiello, but a controversial penalty from Bobby Grant in the 73rd minute levelled the scores once again and Kevin McIntyre fired in the winner with 10 minutes to go.
"It didn't feel good on the bench. I felt sick for 25 minutes in the second half," Coleman claimed.
"We grew up as a team. It was a bit of a watershed, a coming of age. We put in a hell of a lot of work and a hell of a lot of effort and played some good football as well and showed a lot of determination to come back from behind.
"There were some fantastic performances and I was delighted for the players and McIntyre's goal was a great goal and worthy of winning any match."