Going into the incredible season finale City were 1-9 to lift the trophy and United could have been backed as big as 5-1.
But that all changed no less than 50 times during in-play betting which saw thousands of bets place per minute in the during the second half alone, making it the busiest betting climax the industry has known.
When 10-man QPR took an unexpected lead at the Etihad the roles reversed completely and United were in the driving seat at 8-13 with City outsiders at 6-5.
As extra time loomed with United winning and City losing the title was Fergie's at 1-33 but City's grandstand finish from 90 minutes on the clock saw them overcome in-play odds of 12-1 to win their first Premier League trophy in more than 40 years.
Roberto Mancini's side are now 11-8 to win next year's title with Manchester United sitting in their shadow at 9-4. Ladbrokes make the title to be decided on the last day again is 4-1 and on goal difference 33-1.
Bet365 are 6-4 about City winning more trophies than Utd during next season and they are 11-8 to once again finish first and second in either order next season which looks a great bet if you can wait that long to pick up your winnings.
At the other end of the table Bolton were condemned to Championship and are 6-1 to win the league next season while Ladbrokes go 16-1 on all relegated teams bouncing straight back up.
You can have 9-2 Chelsea, 10-1 Arsenal, Tottenham, 20-1 Liverpool, Newcastle and 100-1 Everton.