According to the principles of the Navy Six Techniques, the difficulty of the Six Forms Body Techniques varies. Since modification is necessary, it's natural to start from the simplest part.
Shave and Moon Step belong to the same category, relying on the explosive power of the legs to gain tremendous propulsion. As for Moon Step, if it requires kicking the air to gain sufficient upward reactive force, scientifically speaking, the speed of the foot's kick needs to at least surpass the speed of sound. This is because, according to scientific theory, when an object's moving speed approaches the speed of sound, it encounters a very strong resistance termed as the sound barrier.
