It was a fairytale - pure and simple.
When lifelong Celtic supporter Tony Watt was played in on goal in a Champions League clash against Barcelonain 2012, he lived out the fantasy of every Celtic fan - scoring the winner in front of the Celtic Park crowd in a huge European clash.
Watt pounced on an error from Xavi to place the ball past Victor Valdes, giving Celtic a 2-0 lead, and whilst Lionel Messi did pull one back, it was Watt's goal that won the game.
Seemingly destined for stardom from that point on, that was actually as good as it got for Watt with the Bhoys. After being pushed down the pecking order with the arrivals of Teemu Pukki and Amido Balde in August 2013, Watt made the strange move to Lierse in Belgium, where he hit nine goals in 18 games.
A promising striker who finds the net, Watt has one big problem - his attitude. Numerous clashes with Lierse boss Stanley Menzo led to his demotion to the B team, but fellow Belgians Standard Liege did take a chance on him this summer, paying Celtic £1.2m to sign him - with Hoops boss Ronny Deila firing a warning to 20-year-old Watt.
"I have talked a lot with Tony and he knows that to develop you have to train 100 per cent every day," he said back in July. "You have to be prepared every day. You have to sacrifice everything to improve. Tony took a few small steps - but he has still a lot to work on. He has a big talent but he also has a history at Celtic which makes it harder for him to come through than I think it will be in Belgium."
"He has the chance to start all over and try to take with him some of the things we have talked about. Maybe one day he can come back to Celtic again and be the star he wants to be," he added.
Some questioned the decision to let such a talented youngster leave, but now Deila may have been proven right. Watt has scored just three goals in 21 games for Standard, and is now heading back to Britain with Charlton - who have strong links with Standard Liege via owner Roland Duchatelet - set to sign him on loan, according to reports.
Fitness and attitude problems have already plagued Watt, and it's time for him to heed Deila's advice during his imminent loan spell with Charlton.
From beat Messi and Xavi to playing alongside Andre Bikey and Tal Ben Haim, it's maybe not quite what striker Watt envisaged just two years ago, but that's the reality of football if you don't apply yourself correctly.