On 22nd May, 2005, Scott McDonald etched his name into Scottish football history.
For those unfamiliar with 'Helicopter Sunday', or 'Black Sunday' as it's known by those who wish to entirely forget it ever happened, it was the day that Rangers won the title after a dramatic late swing in results saw the helicopter that was bringing the league trophy to Fir Park for Celtic to raise suddenly turn around and head to Edinburgh where Rangers were playing Hibs.
The score was 1-0 in that game and with Hibs needing to avoid a bigger loss to stay in Europe, the result was essentially agreed upon, and with Celtic 1-0 up late on, it looked like the league had been decided.
Enter Scott McDonald. The Aussie striker was then at Motherwell and he scored two stunning goals to totally swing the result and hand Rangers the title, which caused an internal conflict for the life-long Celtic fan.
Speaking to Si Ferry as part of Open Goal's podcast series, McDonald revealed that even to this day he still gets stick from both Rangers and Celtic fans, and claimed he had been shouted at five times already on the day of filming.
The infamous day, which already today five times I've been heckled about. Every day. Every day. I took the wife out this morning and we're trying to buy some new furniture, and every furniture store you've got, especially in Glasgow it's either one or the other isn't it? So you're getting the best day or the worst day, every day.
It can be quite challenging at times for me personally to deal with the situation because no matter what the individual says you've got stand there and just go... [smiles and shrugs]
It's a defining moment in my career, because of my loyalties and where they lie and who I played for, that if they hadn't been defined on that day I'm not sure I would have had the opportunity to go and progress to where I got to.
So I have to be thankful for that, but at the same time I was only doing my job, and that was to do the best for me and for my football club at the time. So I don't really like talking about it, but the goal I scored that day was an unbelievable goal.
An over-the-shoulder volley gave Rab Douglas in the Celtic goal absolutely no chance and the damage was done.
Initially McDonald celebrated his goal as any striker would, but once he got back to the changing rooms he realised that not only had he caused his favourite club a lot of heartache, but due to the intense nature of the rivalry in Glasgow, he may have put himself in danger.
After tearing up, it took some tough love from a teammate, the late Phil O'Donnell, a former Celtic player himself, to pull him out of that negativity.
You go into a state of shock. People say, 'why did you celebrate?', but to be honest with you, I don't know what the fuck I was doing. I really don't. It was one of those moments where you're like 'Holy shit! This is unbelievable.'
I was shitting myself after the game.
I remember being in the changing room, towel over the head, pretty much in tears, it was just more the panic had set in about 'Holy shit, what's gonna fucking happen here? I'm going to get done in here. Someone is gonna come to my front door or throw a brick through the window, all those things come through your brain.
But it was once certain individual who pulled me out of it, and it was Phil O'Donnell. It meant a lot, because he had played for Celtic, and he was like 'Do you know what? You can't sit here and be all upset, this is your moment, this is our moment. You play for this club, don't be so stupid.'
That sort of helped me at that moment.
It's something that will never go away, as even though Scott McDonald would eventually sign for Celtic and do well for the club, he would always be the man that handed the title to Rangers.
You can watch Scott McDonald's chat with Si Ferry below:
