Firo’s first instinct is to push back to resist Roland's directing, because he's always been rather stubborn. The knife slips in his surprise, and he grits his teeth as he has to right it to resume cutting at the hair.

“Let go! ‘M almost done. And you're up there!"

He'd promised not to be reckless, but he hardly thinks it counts as being reckless if he's trying to block a friend from getting shot while he's trapped. Besides, just one swipe more and he'll be free!