Cut Fast Ball (컷 패스트볼; Keos Paseuteubal) is a strong punch technique that followed after the user boost their body with Pitch Changeup skill. This straight punch is used to break through enemy's defense or hand guard by releasing powerful black and red Shinsu shockwave blast, sending the enemy flying away. Unlike Pitch Changeup, where the Shinsu is just floating around the user's hand, this technique shoots it off in the form of energy wave.