Kevin didn't choose a stick but a spear that had a sharp blade at each of its two ends, which made it deadly dangerous, especially in the hands of an expert like him. He began to use his technique, and Axel was hypnotized; he watched Kevin's movements, but like the last time, he couldn't understand them.
Learning a technique was relatively easy; you just had to decipher the movements of that technique until you could predict which one he would use next. However, no matter how focused Axel was, he could never anticipate Kevin's next move. Each time he thought he had understood his technique, he found that he hadn't at all.
Kevin stopped after 30 minutes and saw that Axel looked frustrated. He laughed and approached him to explain his technique.