The change of attitude and improvement in performance of Manchester United during Ole Gunnar Solskjaer's eight-game stint as manager has been almost miraculous.
Jose Mourinho's toxic last few months in charge looked as if they could have a lasting effect, but the Norwegian has pretty much banished all those demons within less than two months.
United defeated Tottenham 1-0 at Wembley to show the world they were capable of beating the best once again and added another big scalp to their collection in Arsenal on Friday night.
A counter-attacking masterclass saw the Red Devils beat Unai Emery's side 3-1 at the Emirates, Alexis Sanchez, Jesse Lingard and Anthony Martial grabbing the goals.
Every single player at the club appears to have shown some kind of improvement under Solskjaer, with Paul Pogba looking like a world beater once again.
Even players more associated with Mourinho's style like Ander Herrera and Nemanja Matic look to be thriving in a more positive, attacking environment.
Herrera was a key man once again in defeating Arsenal and the Spaniard's thought on United's current situation after the game really were eye-opening.
Herrera said, per Mirror: "We are playing with no limits, yes - it’s exactly what Ollie brought to the team since the first day.
“We enjoy scoring goals and we enjoy defending together. You can see that when we are playing free with a smile and everyone is playing for each other then the results will come easier.
“We are doing great. It’s always beautiful to win. That’s why we play. Ollie has said we want to be a team that controls the game but sometimes that’s impossible.
“Sometimes we have to defend, but when we defend we know anything can happen because we have so many quick, attacking, offensive players.
“I can make runs to be in the box, Paul (Pogba) can make runs to drive the ball forward, Ashley (Young), Luke Shaw is allowed to win the ball in the box and make a run even to the opponents' box.
“Now I am allowed to go into the box soon after I defend. Even Nemanja Matic is allowed to shoot.
“Attacking players can feel free. As long as everyone defends when we lose the ball. And I think that is what we have now.
“Everyone is allowed to go and attack. So when we are playing everything is possible because even in the tough moments when we are defending, we have the feeling that we can hurt the opponent because we are allowed to attack.
“Of course it’s wonderful to have that freedom. But it’s also a responsibility because you know if you are in your opponents’ box and you lose the ball, you have to come back.”
While Mourinho isn't named by Herrera, it's obvious he's taking a clear swipe at him.