Many England fans still have nightmares over the 2-1 defeat to Iceland in Euro 2016's round of last 16 clash back in June.
Some still can't quite understand how a team brimming with exciting Premier League stars were beaten by a country with a population of just over 300,000 - particularly when they even opened the scoring.
Less than six months and two England managers later, Scotland fans rolled into town on Friday ahead of the World Cup qualifier against the Three Lions at Wembley.
So, of course, they were going to rub salt in England's wounds by reminding the home side and their supporters of their most humiliating defeat for over a decade.
And they did it in brutal fashion.
As well as being one of the surprise packages of Euro 2016, Iceland will also be remembered for bringing the 'thunderclap' into prominence.
The rousing act was performed by their fans throughout the tournament and the players also joined in after beating Roy Hodgson's team in the last-16.
Over 14,000 Scots were in London ahead of this evening's kick-off but one small group of supporters went viral for a brilliant rendition of the thunderclap.
As you can see below, the clap was in full flow outside the 'coincidently' named Iceland supermarket.
We have to admit that is a pretty solid effort.
England fans can only hope they are the ones laughing at the end of the night by picking up the three points.
The Three Lions are still heavy favourites for the clash and interim boss Gareth Southgate knows that bar another Iceland-like defeat, the full-time position is his to lose.
Scotland currently sit fourth in Group F on four points while tonight's hosts are top, three ahead of their old rivals after three matches.