Chinese fighter Gou Dakui was about to punch his way to a second-round victory over Thai Super X Sitsontidech when he accidentally knocked out the ref with a brutal kick to his face.
Dakui apparently failed to notice his gaffe and raised his arms in a gesture of triumph in the neutral corner while the poor ref was receiving medical attention. When he saw what the fuss was about, he got down on his knees to apologise to the man.
Another referee waved the fight off and declared a knockout victory in Dakui's favour.