The champions were thrashed 3-0 by Manchester City on Tuesday and fans later turned on Ferguson & Moyes, but which man is most to blame for the club's current failings?
An Edin Dzeko brace, plus a fine Yaya Toure strike, gave Manuel Pellegrini's side victory at Old Trafford and the home fans swiftly turned on the manager and his predecessor.
Such was their fury, stewards were forced to form a barrier in front of the Stretford End's 'Chosen One' banner in case it was torn down by the watching faithful.
The defeat guaranteed that United will finish this season with their lowest ever Premier League points tally, and saw them drop 12 points behind fourth-placed Arsenal – all but ending their hopes of qualifying for the Champions League via their league position.
Of course, it is not the first time United have been humbled at home this season, with Liverpool also running riot just a fortnight ago.
So what do you think? Is Moyes to blame for the club's current failings, or is it Ferguson's fault for hand-picking the wrong man and leaving him with a threadbare squad?