Jurgen Klopp's reaction to Lionel Messi's stunning free-kick is still absolutely priceless.
Two years ago today, Messi scored a double in a 3-0 win over Liverpool in the Champions League semi-final first leg at the Nou Camp, including one of the greatest set-pieces of his career in the second half.
The unstoppable 35-yard strike past Alisson was the perfect way for Messi to reach 600 goals for his beloved Barcelona.
It was so spectacular that opposition manager Klopp couldn't help but marvel at the genius he had just witnessed.
Of course, Barcelona would completely bottle the second leg by losing 4-0 at Anfield, a result that reportedly left Messi "in tears".
Liverpool went on to win a sixth European Cup and it meant Messi's outrageous goal ultimately didn't count for anything, but we can all still appreciate the absolute magic he conjured up.
The seven-time Ballon d'Or winner has a thing for making opposition managers stand up and applaud, doing the same with compatriot Diego Simeone when he scored the winner against Atletico Madrid a couple of seasons ago.
With four minutes remaining, Messi stunned the Wanda Metropolitano when his curled effort beat Jan Oblak from the edge of the box after a one-two with Luis Suarez.
The Atletico boss went from anger at his side's failure to not concede to applauding Messi for his quality strike as he walked back to the dugout.
Another example of Simeone's appreciation for his fellow Argentine came a few years earlier when he failed to celebrate Fernando Torres' goal against Barcelona.
The Spaniard scored a superb goal five minutes into the second half to put the hosts ahead of the Vicente Calderon.
When asked why he did not celebrate his team scoring in the post-match press conference, his answer was simple: he saw Messi warming up.
Featured Image Credit: BT SportTopics: Football, Lionel Messi, Jurgen Klopp