Okay I'm a little confused... Nothing new there but... the Kake Geri is the "hook kick" Similar to Mawashi geri but striking with the heel. Pic here This is not to be confused with the Kakato geri or heel/axe kick often used by TKD practitioners. This is the technique that is being discussed. Fumikomi Geri, the Stomp kick or stamping kick is found in Tekki Shodan. So, OrionRyu are we talking about the correct thing? I suspect it's either the Kake Geri or Kakato geri the former I believe to be the more difficult one to execute. The Kake geri does have the illusion of a change in direction that you refer to.