Russell Slade admitted he was relieved at the timing of Leyton Orient's winner against Coventry in the Capital One Cup.
Kevin Lisbie settled a five-goal thriller in the favour of Slade's side as they ran out 3-2 victors on Tuesday night.
Carl Baker opened the scoring for the Sky Blues before Lisbie and Dean Cox gave the O's a 2-1 half-time advantage.
But although Baker was sent off for a dangerous challenge on Romain Vincelot in the 55th minute, Franck Moussa equalised four minutes later for the visitors.
Leon Clarke then squandered the chance to restore City's lead when he had a penalty saved before Lisbie's last-gasp header from Moses Odubajo's cross settled the tie.
"I'm glad it was in the ninety because, for sure, we didn't want another thirty," Slade said.
"For the neutral, I thought it was a great game, but it wasn't for me at times because sometimes our defending, uncharacteristically, was not the greatest.
"After the penalty save, we rolled our sleeves up and that spirit that we've got, the focus and commitment, all came out and there was only going to be one winner I felt in the last 10 minutes."
Slade acknowledged his troops showed plenty of character.
"We managed to dig in and show great, great spirit, which is what the group is all about if I'm honest and we hung on in there," he added.
"It was a cracking cup-tie. You don't see too many round-one ties like that, so credit to both teams who played their part."