Rolando Aarons and substitute Moussa Sissoko struck as Newcastle dumped holders Manchester City out of the Capital One Cup with a 2-0 win at the Etihad Stadium.
To compound City's woes, as manager Manuel Pellegrini's decision to field a strong side just four days before a Manchester derby backfired, key playmaker David Silva limped off injured early on.
But after a dismal start to the season, Newcastle and Alan Pardew are suddenly enjoying a mini-revival with three successive wins all competitions easing the pressure on the under-fire manager.
Aarons stunned City when he capitalised on poor defending early on and the hosts, despite controlling possession and creating some chances, never truly convinced.
Newcastle were denied what seemed a clear-cut penalty in the second half but Sissoko finished the job 15 minutes from time, loosening City's grip on the trophy with a fine finish. Pellegrini's men have now gone three games without a win and need to regroup with two big games in the next week against United in the Premier League and CSKA Moscow in the Champions League.
Losing Silva, who was surprisingly not granted a rest along with likes of Joe Hart, Vincent Kompany and Aguero, made for a dismal start.
Silva was injured when fouled by Ryan Taylor, making a welcome first Newcastle appearance in two years after overcoming cruciate ligament trouble, on the edge of the area.
The Spaniard looked in considerable discomfort and left the field for treatment as Yaya Toure blazed the free-kick over the bar.
Silva did return in an attempt to run off the knock but soon admitted defeat and made way for Samir Nasri to return to action after seven games out with a groin injury.
But Pellegrini could not make the change before Newcastle claimed a shock lead. Taylor was again involved, robbing Fernandinho and releasing the pacy Aarons, who burst through to slide a shot past Willy Caballero.
Newcastle then doubled their lead when Sissoko, who entered the fray just after the hour, took possession outside the area and weaved his way past Fernandinho and Sagna before clipping shot past Caballero.
CAPITAL ONE CUP QUARTER-FINAL DRAW
Derby County v Chelsea; Tottenham Hotspur v Newcastle United; AFC Bournemouth v Liverpool; Sheffield United v Southampton.
Ties to be played week commencing December 15