Centreline: The vertical axis of your body, from your head to your junk, its your vertical center of gravity. There is a front side that is protected by your arms and legs, and the back side that is unprotected.
Facing: Orienting your body so that the front of your Centreline points towards your opponants centreline, like a compas needle ie you can always hit them with both arms and legs.
At 1:55 of the Buakaw Vs Holtzken fight. Buakaw feints a kick, jabs, Holtzken deflects it, and Buakaw angles right slightly, but keeps moving in towards Holtzken's Centreline. Holtzken throws a rear right knee, but Holtzken's is not FACING Buakaw. Buakaw is FACING Holtzken so he easily returns with a right leg kick. Holtzken does almost the exact same thing, but starts it with a reaching right cross which glances off, because he is still not FACING Buakaw.
Facing: Orienting your body so that the front of your Centreline points towards your opponants centreline, like a compas needle ie you can always hit them with both arms and legs.
At 1:55 of the Buakaw Vs Holtzken fight. Buakaw feints a kick, jabs, Holtzken deflects it, and Buakaw angles right slightly, but keeps moving in towards Holtzken's Centreline. Holtzken throws a rear right knee, but Holtzken's is not FACING Buakaw. Buakaw is FACING Holtzken so he easily returns with a right leg kick. Holtzken does almost the exact same thing, but starts it with a reaching right cross which glances off, because he is still not FACING Buakaw.