Having seen his 'money-bags' failures spend 95 minutes huffing and puffing - at home - against a team from (the old) Division Three - without a goal .... he blamed the referee for not adding on more time!
But such is life with the Gloryseekers ... the referee gets the blame.
And in an AMAZING interview, Ferguson looked as though he was cracking up.
And now Ferguson will find out within the next 48 hours whether his latest confrontation with officialdom has landed him in even more hot water.
His attack on referee Chris Foy, for the amount of injury time he DIDN'T add, was understandable.
After all, Foy hadn't read the Premiership rule 65B on page 108: "When at Old Trafford the referee must add enough injury time for Man Utd to score".
However, with a two-match touchline ban still hanging over him as a legacy of his tirade at Alan Wiley earlier this season, Ferguson might have been better advised not to make his views known.
Indeed, as Foy did play five extra minutes and United hardly deserved to wreck Leeds' dreams of a first Old Trafford win since 1981, it merely disguised an abysmal afternoon.
"The referee gave five minutes," complained Ferguson. "That is an insult to the game and the players out there."
WHAT A TIT!!!
REVIEW OF SUNDAY'S GAMES ...
Leeds emerged from five years of hurt to inflict some pain of their own as Jermaine Beckford's first-half goal sent old enemies Manchester United crashing out of the FA Cup.
It is six years since Leeds' loyal supporters have made the trip to Old Trafford - and not since 1981 had they returned across the Pennines celebrating victory.
But in manager Simon Grayson they have a man with the club in his heart, and in Beckford they have a striker capable of shooting them to better things - should he stay.
When his 20th goal of the campaign trundled past Tomasz Kuszczak, you could just sense the hosts would not be saved - not even by the five minutes of stoppage time that must have shredded a few nerves before the final whistle.
Leeds' reward is a trip to Tottenham in round four.
Arsenal came from behind to book a place in the fourth round with a 2-1 win at West Ham.
Both managers had one eye on their respective Barclays Premier League campaigns at opposite ends of the table with their team selections.
The Hammers took the lead in first-half stoppage time when Alessandro Diamanti beat the offside trap, but the Gunners turned things around with late goals from Aaron Ramsey and Eduardo.
Two goals from Daniel Sturridge inspired Chelsea to a 5-0 thrashing of woeful Watford at Stamford Bridge as the holders moved effortlessly into the fourth round.
Sturridge started and finished the scoring as Chelsea produced a five-star showing against their Coca-Cola Championship opponents.
An own goal from John Eustace, a deflected effort from Florent Malouda and a thunderous finish from Frank Lampard were sandwiched in between Sturridge's brace as Chelsea dominated from the start.
Wolves midfielder Matt Jarvis atoned for missing an open goal by scoring the winner in a hard-fought 1-0 victory over League One Tranmere at Prenton Park.
Nenad Milijas threaded a brilliant ball between Tranmere's two central defenders and Jarvis ran on to hit a first-time shot past Luke Daniels for a 77th-minute clincher.
Richard Cresswell's equaliser in the final seconds of the first half saw Sheffield United set up replay with QPR after a 1-1 draw.
The home side dominated the early exchanges but QPR got back into the game, with Jay Simpson eventually giving them the lead seven minutes before half-time when he finished Wayne Routledge's superb right-wing cross.
But the Blades responded smartly and equalised in first half stoppage time when Cresswell stepped across his marker to send his looping header into the top left-hand corner.
In an end-to-end second half the best chance came 10 minutes from full-time when United's Ched Evans thumped an incredible 35-yard free-kick onto the underside of the bar but neither side could grab the winner.
Notts County's tie against Forest Green Rovers was postponed due to a frozen pitch at Meadow Lane.