The former United striker was managing Manchester City at the time, and thought his side had earned a respectable draw when Craig Bellamy made it 3-3 in the last minute of normal time.
But Hughes was left frustrated when referee Martin Atkinson allowed play to continue beyond the four minutes of injury time initially allotted.
In the 96th minute, Ryan Giggs found Owen inside the Blues' penalty area, and the ex-Liverpool striker slotted past City goalkeeper Shay Given.
It left Sparky furious, as he explained in the latest UTD Podcast:
“Mr Atkinson, Martin Atkinson, God bless him, decided to just forget to look at his watch,”
lamented Hughes.