Yep he is. I learned in the same club and he was my PhEd teacher :P

you cant force anybody to accept your opinion..hahahahahahahahah

Quite. The bouncing around is very strange.

Probably you don't know an application of moves in patterns also you train karate (you wrote "TKD kata" and there is no sine motion in karate. It looks strange, it doesn't look natural but it works.

TKD has a high agility to pass in MMA and K1 glory kickboxing. It’s perfecting dynamics and physics. And what you don’t see in the extreem calculating with precise of distance. TKD is the sniper in MMA. Very accurate. TKD alone is a poor defence so have to combine that’s a thruth.

TKD kata has got less spirit true. But it is great for the individual self esteem. Personally I like gratitude and traditional spirit of the nage-no kata done by the Japanese.

The sine wave is to introduce natural movement and power. At first it might look odd, but think about it. If you move with your bodys natural movement you are free to add more power into your movement. Every movement has a specific reason, mostly technical and sometimes for estetic reason (but those are rare). Knowing this, I as a TKD practitioner see alot of things in other older martial arts in which I quiestion the effectiveness or reasoning behind the movements. I love to hear the reason behind those movement to learn to see if it makes sence.