Scunthorpe United manager Russ Wilcox hailed what could be the "most important win of the season" as his side moved level on points with leaders Chesterfield thanks to an injury-time goal in a 3-2 victory at Accrington Stanley.
The Iron were trailing 2-0 at the break with goals from Lee Molyneux after 18 minutes and Peter Murphy's 37th-minute effort giving Accrington a deserved lead.
But Wilcox put on two substitutes at half-time, as well as having a few "choice" words, and it changed the game in Scunthorpe's favour.
Sam Winnall pulled one back in the 49th minute before Hakeeb Adelakun rifled home a wonder goal nine minutes later.
Then defender David Mirfin popped up with an injury-time winner to give Scunthorpe their first win in six games.
"It was an amazing day," said Wilcox. "We were trapped in the hotel for 35 minutes by a van and then we didn't turn up in the first half.
"There were a few choice, but constructive words said at half-time - I made it known the fans had come a long way and we weren't performing - I made a couple of changes and put two wingers on and we turned the game on its head.
"At 2-0 down we knew the next goal would be important and we got it early, got it back to 2-2 and I thought it would peter out for a draw, but then David popped up with a fantastic header.
"It was the best three points of my reign and maybe the most important win of the season."
Accrington boss James Beattie was devastated after the game.
He said: "We looked on course for a win at half-time, the right things were said in the dressing room and we were two goals in front against a good Scunthorpe side.
"Russ made a few changes at half-time and we didn't adapt to them and we are severely disappointed.
"We can take positives out of the first half, but not many from the second half. We are all devastated at the moment."
Stanley, who were the last team to beat Scunthorpe in November, raced into an early lead when Molyneux, on loan from Crewe, slid home George Bowerman's cross.
And it was 2-0 when Murphy collected a chip from Lawrie Wilson on the edge of the area and his shot took a slight deflection to catch out Scunthorpe goalkeeper Sam Slocombe.
But Wilcox made a double substitution straight after the break and it livened the visitors up with top scorer Winnall scoring his 16th goal of the season after getting the ball from Paddy Madden and firing past Marcus Bettinelli four minutes after the restart.
Then in the 58th minute a loose ball in the box came out to substitute Adelakun on the right of the area and he rifled the ball into the far corner.
The Iron were then the better side and were denied by some superb saves from on-loan Fulham goalkeeper Bettinelli, while the crossbar kept out Madden's header.
Then in injury time Gary McSheffery's deep free-kick was headed home by Mirfin for the winner.