Steve Mutzu was taking on Jason Stevenson in a featherweight bout at Shamrock FC 305 when the startling incident happened.
Just six seconds into the fight, Mutzu attempted to push his rival into the cage but was met with a brutal punch to his head.
The sheer power and precision of the blow makes him freeze on the spot.
Completely dazed, Stevenson notices the moment to pounce and unloads a barrage of punches to his opponent after shoving him to the floor.
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Understandably, the referee quickly called an end to the one-sided fight and gave Stevenson a knockout win.
The bizarre moment from the fight in Kansas City, Missouri, quickly went viral online, where viewers were quick to comment their awe.
“He got frozen in space and time, oh my word,” one wrote.
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Another added: “The winner looks like he knew his opponent was out and held back any (additional severe blows.”
“That’s the worst zombie knockout I’ve ever seen,” a third commented.
It comes after footage of one of boxing legend Mike Tyson’s most memorable knockouts went viral – sparking claims he could be set for a comeback.