During the final between France and Croatia, France's Antoine Griezmann scored a penalty goal and celebrated by dropping Fortnite's "Do The L" emote dance right on the field. The dance is one of many options players can use in the battle royale game to celebrate eliminating another opponent on the battlefield.
During Sunday's big game, Griezmann made an L-shaped hand gesture, put it on his forehead and then trotted side to side along Croatia's goal line. France beat Croatia 4-2.
Reactions, along with explanations of the dance, immediately hit Twitter.
It's also not the first time Griezmann danced this Fortnite jig, as seen in this YouTube video from April.
Or other Fortnite dances, as seen in this video starting at around the 6:35 mark.
To learn even more about Fortnite,.
And here is CBS Sports' report about the Fortnite moment.