There was around three and a half minutes remaining in the final round of Alistair Overeem and Mark Hunt's heavyweight bout at UFC 209 when referee Mark Goddard told the two fighters he needed to see more from them as they stood against the octagon.
Overeem duly obliged with a vicious knee to KO Hunt.
Here's a second look.
Hunt said on Instagram after the fight that he had suffered a broken tibia during the bout.
Last night was the second time the Dutch man and the 'The Super Samoan' have met. Previously, back in 2008 at Dream 5, Overeem beat Hunt by submission in the first round.