Well until last night, Burnley were looking pretty damn undefeatable and were threatening to run away with the division, putting together a run reminiscent of Reading's two seasons back. But then along came West Ham and urinated in the Claret, and there is now every chance that the Burnley bubble will prematurely burst.
Those who try to suggest that West Ham were fortunate to win the game are missing the point. This was very much a second string West Ham side, made up of kids and reserves for the most part. Ruddock, Potts and Chambers are only just out of nappies and can only eat well mashed up solids, so it is no wonder Burnley had a few chances over the course of the game, but even with against a kindergarten defence, the mighty pairing of Ings and Vokes couldn't muster a goal between them.
And in the second half, following the introduction of Collison and Downing, followed by Nolan, West Ham totally bossed the game.
So, Burnley have suddenly been reminded what defeat tastes like, and with Treacy dismissed for taking out Collison as the Welshman steadied himself to knock the ball into an unguarded net, the Clarets are already carrying a hang over into the next match. And that match, at Millwall, now takes on huge significance because a second defeat on the trot would send alarm bells ringing around Turf Moor.
Burnley fans will argue that the Cup is an irrelevance but confidence is a brittle thing, and West Ham may have just snapped Burnley's last night. Which would be great news for all the Championship clubs currently trailing in the Clarets' wake.