skribs
Grandmaster
How does it get there? What does it do while it is traveling to that position? I don't do TKD; I don't know this particular form or technique... but that's where I'd start in analyzing an unusual movement during any form or technique. Answer those questions, and we just might discover why it is going there. And, if we don't -- the next question is what does it do afterwards? How does it move from that solar plexus position to whatever it does next?
From a back stance, your rear hand (the one we're focusing on right now) is held straight behind you, palm down, and it circles away from your body and back in to your solar plexus, twisting to be held palm-up.
At 1:42 this is the technique.
You need to do some research into the actual terminology then.
It is actually call uke and the total of the uke techniques are known as uke waza. Uke actually is a receiving action but it's closest translation to English is to stop hence Block.
Uke waza certainly can be used to block punches, kicks and strikes but they are, in fact, much more versatile techniques. To receive denotes one clear a limb, to off-balance, to set up for a strike or throw, or to lock a joint once a limb has been seized. In short, uke waza are not just for blocking and the uke waze movements are to be used in a multitude of applications.
Also movement and position in Kata is working to a precise position where in down and dirty action of fighting getting to a particular position precisely as in Kata may never happen.
Is the same terminology lesson true of the Korean word for Makki?
My experience with kata is that they are exaggerated or precise versions of techniques that tend to get a little messy in a fight, but that there should be an understanding of what it is that you are doing.