To get the drop on someone if opponent is dazed and you have done a combo where they think you are now going to strike from another side don't use this to spin around and attack from the last side you just hit and get the knockout.
Stand in normal fighting stance.
Swing right foot around like you would for a Back punch
except, put you right foot on the ground as you come 3/4 around
Simultaneously lift off with you right foot
Bring your left around like you would a normal Roundhouse
Make sure for a better chance of KO to bring your foot down at a sharp angle to finish.
I use this as a KO move and I just started not that long ago and I am 13-0 with 8 Knockouts.