The spinning backfist is one of the flashier techniques in the martial arts. It can create quite the highlight reel when it connects because often it results in a knockout.
Below, Muay Thai legend Duke Roufus breaks down the spin back fist and some of his favorite setups:
Here is a great example of a knockout from this technique. Andy Hug uses one of the best setups to get the knockout. He fakes the jab then turns hard through for the knockout:
Note: The spinning backfist works best when your opponent is backing up after one of your strikes.