Much had been made of the fact Rooney had failed to score at his old stomping ground since 2007 ahead of the weekend's game.
He got that particular monkey off his back when he strode through on goal and bent home the clincher in the second half to put United 3-0 up.
It undoubtedly exercised a few demons for the former Toffees star.
But rather than celebrate wildly despite the pressure he has been under, Rooney actually showed great maturity with a reluctance to rub salt in the wounds, instead holding his hands up to the skies - in tribute to the sad passing of a man his knew well from his Everton days, Howard Kendall.
Rio did not want to leave his boyhood club West Ham when he was sold to ambitious Leeds United for £18million back in 2000.
It says a lot about the amount of top talent West Ham have lost over the years that a number of their former players feature in this list.
But it also says a lot about the impact the club and its fans have on players that many show them great respect on goalscoring returns (Frank Lampard and Jermaine Defoe excluded of course).
In 2001 Rio returned to Upton Park as Leeds skipper and headed home at the far post to help his side to a win.
Despite being mobbed by his teammates Rio refused to celebrate and could even be seen pushing his teammates away as he emotionally ran back to his own half.
Carlos Tevez for both Manchester clubs vs West Ham
Carlos Tevez always insisted that West Ham were the club that made him, as reported by the Daily Mail last year, despite only spending one rollercoaster year at the club.
Adored by Hammers fans for the passion he showed and goals he scored during their Great Escape, Tevez found it difficult to discover the required motivation to celebrate the goals that would follow against his old club.
When he scored against the Hammers for Manchester United he simply held up an apologetic hand to the away fans.
Then when at Manchester City he found the net twice to bury the East Londoners but instead of celebrating the Argentine striker clasped his hands and appeared to beg the away followers for forgiveness.
He later left the field doing the club's crossed Hammers salute.
Frank Lampard for Manchester City vs Chelsea
Chelsea old boy and all-time record goalscorer Frank Lampard admitted he was almost speechless after coming off the bench to deny former boss Jose Mourinho victory at Manchester City last season.
The 36-year-old midfielder, who was serenaded by the visiting fans at the Etihad Stadium, struck five minutes from time after being picked out by James Milner to cancel out Andre Schurrle's 71st-minute opener.
Of course Lampard did not hesitate to celebrate against another of his old club's West Ham. Each time he scored against the Hammers he celebrated wildly and even described scoring his 200th goal for the Blues against his boyhood club - where his dad is a legend - as 'one of the best days of my life', as reported by the Daily Mail.
Cristiano Ronaldo for Real Madrid vs Manchester United
Ronaldo had sworn not to celebrate against his old club when Madrid faced the Red Devils in the Champions League in 2013.
And he was true to his word after sliding in to tap home past David De Gea and secure a win over old mentor Sir Alex Ferguson.
He walked around the back of the goal with arms raised aloft apologetically and a rueful grimace on his face.
He was mobbed by teammates who eventually gave up trying to cajole the star into some form of celebration and instead went to congratulate Gonzalo Higuain who had provided the telling cross.
Denis Law for Manchester City vs Manchester United
Arguably where the trend to refrain from celebrating all started was way back in 1974 with this man Denis Law.
Having secured legend status at Old Trafford, Law was then at Manchester rivals City when he scored against the Red Devils to condemn his former club to relegation from the top flight.
Not only did Law refuse to celebrate, he was visibly distressed after scoring the goal and has admitted it still haunts him today: "I was inconsolable. I didn’t want it to happen.
"How long did the feeling last? How long ago was the game? Thirty-odd years. There is your answer. The subject always crops up. It’s one of those things. It’s always there and I am always remembered for it. That’s a shame."