Leave it up to FC Barcelona to pull of the most remarkable comeback in UEFA Champions League history.
A PSG own goal and Lionel Messi penalty made the score 3-0 in the 50th minute and put Barcelona only a goal away from the biggest comeback in Champions League history.
PSG's only goal was scored by Edinson Cavani in the 62nd minute to make it 3-1. With three minutes on the clock, the game was meandering toward a straightforward conclusion before Neymar struck a quickfire brace and Roberto stretched to steer home the Brazilian's pass in injury time.
But two goals from Neymar in three minutes - one from a penalty - brought the Spanish giants level before Roberto stabbed the victor in from close range.
PSG cleared it but ter Stegen was then fouled meaning another free-kick.
Their La Liga title defense was looking forlorn - two points behind Real Madrid having played two games more - heading into the first PSG clash.
"I've never experienced anything like that".
'Today was insane. This is Barcelona, the best team in the world and we want to continue our dream in the Champions League'.
Barca's president Josep Maria Bartomeu said on the club's Twitter feed it was a "historic achievement that will be remembered forever".
Ahead of Wednesday's game, Enrique had remained quietly confident that his team could achieve the unthinkable.
"We had to believe, 4-0 was hard, but it is football". The French champions spent the entire first half shitting the bed, dropping ridiculously deep, and were lucky to limit their defensive aberrations to just two.
"When we analyse it, it is true that we have missed a major opportunity", said Emery, who had guided Sevilla to Europa League glory in three consecutive seasons before heading to Paris.
Here's a look back at the results from this week's Champions League showdowns and a reminder of some absorbing contests in Europe's premier club competition. When PSG failed to clear a loose ball in the box he clipped a header goalwards with his back to goal.
Luis Suarez opened the score with a well built up attack putting the ball in the net in the 3rd minute. But if anyone's capable of such an extraordinary comeback, it's Barca at the Nou Camp.
'I dedicate this win to all Barca fans who kept faith in us'.
It's one of the craziest things I've ever witnessed in sports and I still can't really believe it happened. "The team were spectacular".