I'm not too comfy with talking about a pattern I haven't learned yet, but TW, I believe this is a slight terminology snag rather than an illustration of the difference in side kick execution between orgs in this case. The main kick that comes to mind from watching the pattern is the side pressing kick in the opening movements. However, it's execution and purpose differs from a side piercing kick (which is what it sounds like you're describing as what you want to do rather than the prescribed kick in Po Eun).
A few differences as I understand the kick:
-Side pressing kick's primary target is the knee
-Kick's delivered with the supporting leg locked out
-Object's displacement rather than penetration
Side piercing kicks appear in earlier patterns like Won Hyo, Yul Guk, Joon Gun, Hwa Rang.... etc, all of which involve the movement of the supporting leg you've described. The side piercing kick's the kick that's commonly called the side kick, one of the basic bread n' butter kicks. So it's not the ITF version of the side kick you're executing in Po Eun. (At least by ITF standards)
http://www.itf-information.com/patterns12.htm
There's the pattern description. A typical side piercing kick's executed pretty much like Freep's description of his friend's side kick.
A few differences as I understand the kick:
-Side pressing kick's primary target is the knee
-Kick's delivered with the supporting leg locked out
-Object's displacement rather than penetration
Side piercing kicks appear in earlier patterns like Won Hyo, Yul Guk, Joon Gun, Hwa Rang.... etc, all of which involve the movement of the supporting leg you've described. The side piercing kick's the kick that's commonly called the side kick, one of the basic bread n' butter kicks. So it's not the ITF version of the side kick you're executing in Po Eun. (At least by ITF standards)
http://www.itf-information.com/patterns12.htm
There's the pattern description. A typical side piercing kick's executed pretty much like Freep's description of his friend's side kick.