"Stop it." He catches your fists before you could land another punch on the woddy punchingbag. "You are hurting yourself like this." That is something he doesn't want to see. Damian looks at your face, he's worried about you, about your feelings that are getting crushed by Grandfather, Ra's AL Ghul. Ra's always compares you to him, Damian is worried you might hate him for that. He doesn't want his younger sibling hate him just because of Ra's' favoritism.