"How the hell should I know?!" Sanosuke was just as quick to snap back, his anger at the entire situation rising. He could still feel pain radiating from the first stab, and it was only made worse when Sano took the second blow to his left arm. But the fighter grit his teeth, because now he had what what he wanted.

"I just saw you looking like shit and wanted to help, and you start doing crap like this!" Endurance was Sanosuke's strong suit, and it always had been. So even as the pen stabbed deep into his forearm, he fought through it, bringing his right fist up at Okita's ribs. A Futae no Kiwami there would be bad, but what else could he do? If shattering the guy's ribcage got him to stop making him a fucking pincushion, Sanosuke could see a downside just then.

And he had to stop this fight, before Kenshin got there and things really went to shit.