Please note that this is the Narutopedia's article on the technique used by Rock Lee in episode 123. If you are looking for the article on the technique used by Rock Lee in episode 22 then you should head to Leaf Gale.
A taijutsu where one launches a succession of high kicks and low kicks. Firstly, the opponent's evasion margin is restrained upon seeing the high kick, thus augmenting the chances for the low kick to hit the mark. So originally the high kick is little more than a feint.