UFC fighter Jorge Masvidal knocked out his rival Ben Askren in just five seconds with a flying knee.
Video shows the moment the MMA fighter exploded out his corner as the bell went at UFC 239.
Askren also moves forward for the centre of the octagon and appears to dart forward for a takedown.
Masvidal, 34, however thrusts forward with a jump knee strike.
The point of his knee strikes his rival, also 34, firmly on the skull, sending him sprawling backwards KO'd.
Landing another two strikes to make sure he is down, the referee then calls the bout in just five seconds – the fastest knockout ever in UFC.