An extraordinary incident Sunday in the Jupiler League in Belgium saw Standard Liege's Mehdi Carcela-Gonzalez sent off for punching his opponent.
It might sound indefensible, but as you can see in the replays in the video above, he was responding to a sickening challenge from OH Leuven's Bjorn Ruytinx on his ankle.
Be warned if you're of a squeamish disposition—the tackle from Ruytinx is not for the faint-hearted. You can see the ankle buckle, bending in a way that ankles simply aren't built to do.
Ruytinx smirking also probably didn't help the situation, and with a rush of adrenaline, Carcela-Gonzalez leapt to his feet and threw a right-handed punch to put him on the ground.
Understandably, the red card came out for Carcela-Gonzalez, while Ruytinx was only cautioned for his challenge.
Carcela-Gonzalez received his marching orders but couldn't march. His injury now restricting him, he had to be helped off the field.
He is likely to receive a substantial ban, but that's the least of his worries in some respects. If he has broken his ankle or sustained ligament damage, he is set to be ruled out of football for longer than his suspension.
There is no word yet on how severe the injury he sustained was.
The Moroccan only rejoined Liege recently after a stint in Russia with Anzhi Makhachkala.
Astonishingly, it may not even be the worst foul Carcela-Gonzalez has suffered. In 2011, he was booted in the face during a game and knocked out cold. Again, if you're squeamish, don't watch.