[He didn't really need it, no. He's already worried he'll be a burden just by existing on the battlefield -- knowing he has the power to help the others but could only further inconvenience them by using it was endlessly frustrating in situations like this.]

No, you're right. I'll just have to try my best not to get in the way. I don't want the rest of you feeling obligated to protect me the whole time we're out here.