Korean influence on American martial arts

In looking at the evolution of martial arts in the last few decades, you see big changes. A lot of people may think that the spinnng back kick, axe kick, spinning back fist, etc. are part of some ancient martial art. When former military men came back from overseas duty, they brought martial arts systems from where they were stationed. Those stationed in Okinawa brought back Karate and those stationed in Korea brought back Tang Soo Do/Tae Kwon Do. The early American Karate tournaments consisted of Japanese based competitors. When the Korean influence came about, people had never seen the jumping and spinning kicks. A friend of mine who started out as a Shotokan guy back in the day said that his first time seeing a spin kick was during a fight. His opponent stands in front of him and is hopping up and down (like a Tae Kwon Do guy). The guy jumps and spins. My friend wakes up later in amazement realizing that he just got knocked out with a spin kick. http://www.youtube.com/watch?v=R-KPUjNLgOU&feature=fvwrel