It's fair to say Federico Macheda, who will join Cardiff City on 1 July, never truly fulfilled his potential at Old Trafford. And yet the Italian striker leaves knowing his place in Manchester United's history is forever secure.
Sent on as a 17-year-old substitute when the Reds were trailing 2-1 to Aston Villa in April 2009, Macheda followed up Cristiano Ronaldo's equaliser with a spectacular late winner to keep United's title charge on track.
Of course, Kiko went on to make a further 35 appearances for the club and scored another four goals. But that moment against Villa will guarantee he'll never have to buy a drink at the bar so long as there's a Reds fan around.
Here are five other former players whose United careers were defined by magic moments...
Mark Robins (vs Nottingham Forest, 7 January 1990)
Though chairman Martin Edwards insisted it did not save Alex Ferguson’s job, there’s no denying Robins’ goal in January 1990 was a turning point in the manager’s United career. With the Reds winless since mid-November and falling towards the relegation zone, Ferguson’s position was reportedly under threat. Up popped 20-year-old youth product Robins to net the winner in an FA Cup third-round tie away at Nottingham Forest. It was a defining moment and United went on to avoid the drop and win the cup, kickstarting a golden era. Robins hit 10 goals that season but was unable to hold down a place in the first team thereafter and joined Norwich in 1992.