France managed to pick up all three points against Luxembourg on Saturday night to continue their march towards next year's World Cup in Russia.Atletico Madrid striker Antoine Griezmann opened the scoring for Les Bleus, but the real star of the show was Arsenal frontman Olivier Grioud, who found the net twice to settle matters despite the minnows hitting one of their own.The 30-year-old got on the end of Bernard Mendy's cross in the 77th minute to put the game out of reach of Luxembourg and chalked up his 23rd international goal.However, more interesting than the strike was his reaction to finding the net, as he appeared to direct an angry celebration at somebody in the crowd.Upon finding the net he ran over to a section of supporters with his hand cupped to his ear, though most people struggled to figure out why.The only real explanation would seem that something the Luxembourg fans did during the game upset him and he hit back at them in his own way.We're not sure what they could have done, considering the gulf in class between the two nations in the international football landscape, they must have said something deeply personal and hurtful.Check the video below and see for yourself. Skip to 1:00 to see the incident...

Weird, right? We can't remember the last time we saw him so angry, and Gunners fans must be wondering where that kind of explosion came from.

For those who can speak French, there was a reaction to his behaviour of social media, as it turns out a number of fans noticed that the explosion was rather out of character.

After reading those, maybe he was angry at his own fans, who don't seem to like him too much, so it's slightly hard not to feel for the guy considering he's remained rather consistent for club and country for the past few years.