The Kung Fu called Speed

Ordinarily, a fight against an S-ranked expert would be a highly anticipated event. However, watching this match, the princess couldn't help but wince in pity for her godfather as Zero used him as a demonstration for some new fighting techniques that included the mysterious art of hitting acupoints. 

"This is also a good point that you should try and get when you can. It's just underneath the elbow and hitting here," Zero demonstrated with a swift jab to the point, "It will make them drop their weapons."