Six straight wins to their credit, table-topping West Ham were sent packing at Colney today as David Williams's side crashed in five goals against the Hammers.
Two goals to the good inside the first five minutes, both from Chris Martin, the visitors hit back before Martin completed his hat-trick in first half injury time.
West Ham came out all guns blazing after the break to once again reduce the deficit but the Canaries hit back with further goals from Ross Kelly and Luke Daley.
Williams had the luxury of a fully fit squad to choose from, although he decided to rest both Gareth Matthews and Kurtis Byrne who had both been on Republic of Ireland Under-17 duty during the week.
The game got off to an explosive start with City taking the lead on three minutes when Bally Smart picked out Martin who finished in some style, lifting the ball over West Ham keeper David Blackmore.
Chris Martin completes his hattrick
Mark O'Toole fights for the ball
Two minutes later, and City were two goals to the good in somewhat bizarre circumstances.
Referee Mr Goldsmith angered the West Ham bench when he awarded City a penalty after striker Kris Renton was bundled over inside the area.
Martin however did what could only be described as a David Beckham, when his standing foot gave way and he ballooned his spot kick over the bar.
His blushes were saved however when the referee ordered the kick to be taken again, after West Ham had encroached inside the area.
The referee brushed aside further serious protests from West Ham and at the second attempt, Martin made no mistake, sending keeper Blackmore the wrong way.
There was no stopping Martin and he almost scored his third, just failing to get a touch on a through-ball from Smart. Next it was the turn of Renton to go close after a good ball from Mark O'Toole but Blackmore was equal to the effort, making a point blank save.
City keeper Steve Arnold pulled off two good saves to deny Tom Harvey and Jack Jeffrey and moments later he made the save of the game, again to deny Jeffrey.
With just six minutes to go before the break, the visitors hit back when Jack Collinson converted from the penalty spot.
It was the Canaries who went in on top, however, when Martin completed his hat-trick with, once again, Smart being the provider.
Just seven minutes into the second half, and West Ham clawed themselves back into the game once again with Junior Stanuslas finishing from close range but there was no stopping Norwich as Ross Kelly fired in a shot on the hour mark from the edge of the box.
Substitute Luke Daley completed the scoring twelve minutes before time with a shot into the bottom left hand corner.
Jamie Eames tries to find a way through
City Line-Up: Arnold, Bexfield, O'Toole, McLean, Quaye, Kelly, Eames, Lathrope, Renton (Daley 65), Martin, Smart.
Subs not used: Muddel, Miller.
Top Canary: Chris Martin.
Further Action From The Match
West Ham players discuss the penalty decision with the referee
Chris Martin about to do a "Beckham"
Kris Renton about to be fouled!
Steve Arnold guessed right but West Ham scored form the spot
Bally Smart was a constant thorn in West Ham's side
Alvin Quaye tracks back against his old club
Goalscorer Ross Kelly on the ball
A last-minute West Ham free-kick hits the post with Steve Arnold beaten