Even though Grado could still escape the sticky situation, he chose not to since Satoshi cornered him fair and square. On the other hand, Satoshi thought that his grandfather would concede right then and there. After all, he was already caught off-guard, freezing up as soon as Satoshi pressed the chainsaw on his neck.
For a couple of seconds, the two of them stayed still. Satoshi was at an advantage, but he didn't budge even then. His grandfather might catch him off-guard when he moved, so he remained utterly still. He even went as far as to hold his breath, so he really won't budge.
A chuckle came out of Grado's mouth as he deactivated his superpower. Raising his hand, he turned towards Satoshi. "I forfeit," He said. Despite his defeat, the sparkles in his eyes were evident, as if he was the one who won the match.