Kaiba in the clear meant Roland could focus on the opponent coming after him, as everyone left behind to take care of the eight seemed they could handle their own without his aid. It's a particular call from the SCA that rings sharp in his ear which startles him so, a distraction strong enough that he forgets to dodge the incoming laser shot, piercing his shoulder clean through. It's not debilitating enough for him to stop, adrenaline filling in the blanks as he frustratingly rushes to the robot, attacking it in three clean slashes until it bursts wires and sparks out of life.

He's too wound up to care about wounds or such things, already scanning the battlefield for more robots he needs to cut down so they could get out of here and get to work.

(Or escape the pain that follows him, he needs to breathe, he needs to call back.)