Substitute Adam Le Fondre hauled Stockport off the bottom of the Coca-Cola League with the two goals which nicked three points away from promotion-chasing Grimsby.
Jim Gannon's strugglers looked likely to provide only a hapless `assist' as Michael Reddy's 48th-minute goal put the Mariners on course to grab the headlines by going top of League Two.
But Le Fondre changed all that by finding the Grimsby net in the 72nd and 79th minutes to give Stockport only their second home win of the season and drag them above fellow strugglers Rushden and Torquay - as well as keeping Grimsby in only third place.
Stockport's win was easily the most notable of an otherwise unremarkable night which saw Plymouth put their fellow Championship relegation candidates Leicester in more trouble with a 1-0 win at Home Park.
Paul Wotton got the only goal in the 47th minute.
There was also a solitary match in League One - and it went resoundingly the way of hosts Blackpool at Bloomfield Road, where Doncaster took a 4-2 beating.
Simon Grayson's relegation candidates were in front thanks to Tony Butler (16) and then - after Michael McIndoe's Doncaster equaliser from the penalty spot - were back in control via two goals in as many minutes just before the break, courtesy of Ian Morris and Keigan Parker.
Peter Clarke (54) made sure in the second half, although Ross McCormack got a second for the Yorkshiremen in the last minute.
Back in the basement, Danny Reet (51) seemed likely to inflict the wrong result on Keith Curle as the Chester manager went back for the first time to his old club Mansfield.
But Curle's return to Field Mill was to have a 2-1 happy ending for him thanks to Scott McNiven (54) and Derek Asamoah (69) - as well as two yellow cards for the hosts' Richard Barker who was dismissed in the 66th minute of a match which saw Chester leapfrog their opponents in low mid-table.
League Two's other losers were Torquay, who went down 3-1 at home to Rochdale to sink to second from bottom.
Chris Dagnall (29), Gary Jones (48) and Richard Lambert (68) did the trick for Steve Parkin's long-distance travellers - while Morike Sako got the hosts' consolation.
Northampton made only a modicum of ground at the right end of the table, thanks to two equalisers from Jason Crowe (69) and then Eoin Jess (77) at Meadow Lane where first David Pipe (24) and then Lee Crooks (75) threatened to make it a better night for Notts County.