United brought the curtain down on a disappointing season by smashing Spurs 5-1 at St James's Park to give the supporters something to celebrate as they prepare for a stint in the Championship, having finished 18th in the table, two points behind Sunderland.
Tottenham trailed 2-0 at the break but Erik Lamela pulled one back, before their comeback was given a further boost when Newcastle striker Aleksandar Mitrovic was given a straight red card for a horrendous challenge on Kyle Walker.
Despite the numerical disadvantage, Rafael Benitez's side scored three more times in a ruthless final 20 minutes, destroying Tottenham on the counter-attack to seal a quite amazing victory - one which saw Spurs miss out on second spot.
Given how strong Tottenham have been against 11 men this season, Darlow could have justifiably feared the worst when his team went down to 10, and the 25-year-old admits it shocked him what transpired.
"I couldn't really believe it. We were down to ten men and ahead by a goal for the last 20 minutes and I was expecting a really difficult end to the game," he told the club's official website.
"You expect us just to sit back and avoid conceding again but we played Spurs on the counter attack ruthlessly and we got our reward."