Mansfield battled back from a goal down to beat Grimsby.
Michael Coulson, who had earlier missed an easy headed opportunity, put the Mariners ahead with a fine curled effort from outside the area.
Paul Connor forced a fine save from visiting keeper James Mckeown before Luke O'Neill hit a thunderous free-kick from 35 yards to level the scores.
Connor notched the Mansfield winner with a far-post header from O'Neill's deep corner.
VIEWS FROM THE DRESSING ROOM
Mansfield Town manager Paul Cox told BBC Radio Nottingham:
"We never turned up for 45 minutes and there were a few harsh words in the dressing room and a few bruised egos, but the lads chucked what I said right down my throat in the second half.
"It was a great win against a strong side.
"We cannot afford to turn up for 45 minutes and expect to win football matches, but we did superbly in the second half and could have won it by an extra goal."
Grimsby Town joint-manager Rob Scott told BBC Radio Humberside:
"I thought first half we played very well but we're sick to death of it Paul [Hurst] and I, we keep saying the same things and you might as well put on a tape recorder in the dressing room because we keep making the same mistakes.
"At half time we said 'you've played really well, good tempo and slowed it down when you had to and got in good positions'. Second half we did exactly the opposite.
"They raised their tempo and raised their levels and we couldn't handle it, and two set-plays have cost us the game."