Burnley are set to be relegated - it is just a question of when - after this second-half surrender.
The Clarets have lost 45 of their last 71 games over their past two seasons in the Premier League and look about to be instantly relegated for a third time following promotion.
Despite going ahead with Zian Flemming's goal right on half-time, they failed to capitalise on the anxiety around the City Ground with a subdued Nottingham Forest jeered off at the break.
Forest had previously scored just three goals in eight and a half league games at home yet they then netted four in 45 minutes against the Clarets.
Scott Parker's side folded, even with Forest nowhere near their best, and there looks to be no way back. Relegation could come as early as Wednesday.
The biggest question for the Clarets now is, if they are relegated and again make an immediate return from the Championship, how do they finally consolidate their place in the Premier League?
After all, not so long ago they spent six straight seasons - and qualified for Europe - in the top flight under Sean Dyche.
