You cannot (from any dominant position) posture up,  throw one punch,  posture down then immediately back up again,  throw one punch,  posture back down over and over.  This is an exploit.  The ruling on this is as followed...

* Ruling
~ You must throw at least two punches when you posture up
~ There must be at least 2 seconds in between each posture.

* Punishment
~ The first time you use the exploit you will lose a point for that round.
~ The second time you use the exploit you will be disqualified.
~ If you use the exploit and your free punch resulted in a KO you will be disqualified.