Bracknell Bees twice beat the clock to stun Sheffield Scimitars and take both points at the Hive on Saturday.
Jaroslav Cesky's short-handed goal gave Bracknell the lead but the game changed when Bees' Adam Bicknell was thrown out of the game for kneeing at 2-0.
Bees came under pressure and two goals from Matt Heywood helped Sheffield into a 4-2 lead with one period remaining.
But Bees tied the game at 4-4 with 21 seconds left, then Michal Pinc won the game in the last minute of overtime.
Sheffield should have sealed the win but Heywood and others squandered chances to open an unassailable three-goal lead in the final period.
Bracknell, meanwhile, were left fuming by referee Dave Goodwin's decision to award a game penalty to Bicknell, who insisted the collision had warranted a two-minute minor penalty for tripping at worst.
Lloyd Gibson, the Scimitars player challenged by Bicknell, aggravated a knee injury sustained last year in the incident but is reported to have recovered well and may return for Sheffield on Sunday.
The hot-headed Bees, who had taken a two-goal lead thanks to Cesky's second goal of the night before Bicknell's offence, nearly threw the game away as tempers flared in the aftermath.
Sheffield used the resulting five-minute power play to score twice and draw level, Heywood and Steve Duncombe both squeezing the puck past Bees goaltender Carl Ambler from tight angles.
Mark Stewart put Scimitars ahead on the half-hour mark with a finish into the roof of Ambler's net, before Heywood added Sheffield's fourth goal without reply at the very end of the second period.
That goal ought to have killed off any fight in Bracknell, but Pinc hauled his team back into the game with a goal five minutes from time to make the score 4-3.
And, with 21 seconds of normal time remaining, Nicky Watt fired home from close range to take the fixture into five additional minutes of golden goal overtime.
Four and a half of those had elapsed when Pinc beat Sheffield goaltender Ben Bowns to record an unlikely victory, one the Czech forward celebrated by moon-walking around the rink.