Eccleshill United have pushed themselves to the brink of safety with a stunning 4-1 win at neighbours Silsden over the weekend.
But that humbling at home for the Cobbydalers realistically spells the end of their play-off hopes.
The Eagles were still in danger of relegation from the Northern Counties East League Premier Division heading into the derby, but are now nine points clear of the drop with only four games remaining.
Conversely, Silsden now sit 12 points off the play-offs with five games to go, and could mathematically be out of contention for that coveted top-five spot by Saturday evening.
Eccleshill did all the damage in the first half-hour at the weekend, as they raced into a 3-0 lead over their shellshocked hosts.
Former Bantams youngster Cole Roberts put the visitors in front after only six minutes, and it was two before the quarter-hour mark when Joao Silva found the net.
Zack Sangster put the away side 3-0 up after half-an-hour, meaning the game was all-but-over by the break.
Daniel Smith pulled a goal back for Silsden on the hour mark, but Eccleshill rubber-stamped victory when Roberts netted his second of the game in the final 10 minutes.
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