Very common move in wushu/kung fu. Haha this guy is no Jackie Chan (Jackie Chan rigidly studied seriously for over 20 years before he became an actor...)
There was one fight where a fighter grabbed the leg of his opponent who was on the floor, grabbed it with both arms, started swinging him in circles (like how you play with a little kid or something), letting go after like 10 spins, slamming his opponent face first into the cage knocking him unconscious.
That was brutal shit.
that was genki sudo... but im not so sure the guy got KO'ed