Kickboxer knocked his opponent, and his tooth, out with brutal spinning backhand

He's completely out!

Hisaki Kato wasn't happy knocking Joe Schilling out the first time, so he did it again for good measure barely one year later

Kato previously knocked Schilling with a superman punch on June 26, 2015, and on June 24, 2016 he knocked him out again.

That has to go down as one of the most brutal knockouts we've seen in recent memory.