Alexis Saelemaekers produced a skill so incredible that it genuinely looked like a glitch in a video game, we need an explanation.
Just after the match referee blew the whistle for half-time, the AC Milan midfielder performed a gravity-defying piece of skill that has stunned the football community.
So, he flicked the ball with his right foot, then back-heeled it with his left foot before kicking it out of touch in one ultra-smooth motion.
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We've watched it over and over again - and still can't figure out what he's done and how he's managed that absurd skill.
Needless to say, Saelemaekers' showboat sent social media into overdrive.
One tweeted: "What is this sorcery."
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A second wrote: "This looks like some kind of witchcraft!"
A third added: "I can't even work out what he's done here."
A fourth commented: "This looks like a glitch in a video game."
As for the actual match between Atletico Madrid and AC Milan, Saelemaekers started in his side's crucial 1-0 win.
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Junior Messias headed home a late winner to keep their chances of progressing to the next round alive.
Featured Image Credit: BT SportTopics: Football