Wilderness Boys joint boss Nigel Fanthorpe
was left fuming after Coulson's late brace earned the Park Avenue outfit victory in the Northern Counties East League Division One clash.
AGONY AND EUPHORIA: Louth Town players celebrate JAMIE
Coulson's late winner while Grimsby Borough keeper Leigh Cook
cannot believe victory has turned into defeat. Submitted picture
Borough had hit back from a devastating start – they were two goals down in as many minutes – to lead 3-2.
But Coulson struck the first half of his double on 85 minutes as the hosts turned the game on its head.
Clare said: "Saturday's game was the reason we all love football, mixed emotions and a highly competitive game.
"I was impressed with Borough with their tidy football and fight off the ball. They will definitely be up there.
"For me, we just edged it on pure determination and spirit and my strikers delivered the goods late on."
Co-bosses Fanthorpe and Steve Newby
said Borough prompted their own downfall.
"This was three points thrown away by some incompetent defending," said Fanthorpe.
An explosive start saw Danny Kilmore and Callum Hyland put Clare's men two goals up in as many minutes.
However, goals from former Grimsby Town striker Andrew Taylor, John Gaughan
and George Newby
saw Borough carry a 3-2 lead into half-time.
But Coulson had the final say when, after equalising to set up a tense finale, he scored with the last kick of the game.