Boston Town were left stunned on Saturday after seeing a 3-0 lead turn into a 4-3 defeat.
The Poachers appeared to be coasting at Newport Pagnell’s Willen Road ground as they looked to have all the points in the bag by the 38th minute.
But the Swans completed a shock turnaround in the space of 36 minutes to leave Mark Angel’s side scratching their heads.
Jordan Nuttell put the away side in front with 10 minutes on the clock as he met Alex Beck’s pass.
That lead was doubled 10 minutes later as Aaron Eyett mixed speed and precision to escape the home defence and fire in a second.
And the Poachers were in dreamland in the 38th minute when Beck made it 3-0.
However, Boston were given a hint of what was to come as Pagnell reduced the deficit before the break, Greg Ling’s header beating James Doughty - who had already done well to deny Fazel Koriya and watched as Sam O’Neill’s effort struck his crossbar.
The Swans netted three unanswered goals after the interval.
A quickly-taken free kick in the 63rd minute allowed Josh Crawley to reel Town in, while two minutes later Bruno Brito levelled things up with a 25-yard strike.
With 12 minutes to go, Koriya turned the game on its head with a strike from outside the penalty area.
Boston attempted to level things up late on, but Lori Borbely fired over and Beck was unable to convert Nuttell’s flicked pass.
Pagnell’s turnaround compounded a frustrating week for Town, who lost 5-2 at Harrowby United, also in the UCL Premier, on Wednesday.
Richard Ford and Beck netted Boston’s consolations.
On Saturday, Boston will host Stewarts& Lloyds Corby in a re-arranged UCL Knockout Cup contest (KO 3pm).
This will be followed by Tuesday’s league fixture away to Lincolnshirerivals Holbeach United at Carter’s Park (KO 7.45pm).