David's eyes went wide when he saw what John did. He didn't know what to do, but see her in pain and upset made him angry. He moved quickly to grab John by the collar of his shirt, glaring at him. Even though he was Mute, he tried to speak. For the first time in all of his life, he spoke. "D... Do.. Don't... hu.. hur.. hurt... h.. her.." he finally said. Then he slammed his fist right into the side of John's head, knocking him back. He stood there, breathing heavily and throwing his bag off of his shoulders and onto the ground. He wasn't about to let someone hurt his one and only friend. The only friend he may ever get in his life. He treasured her dearly, and respected his feelings towards her. But when someone pushes the wrong buttons, things are not going to end well.<br/><br/>David moved forwards toward John and gave him a roundhouse kick right in the face, showing off his Martial Arts skills. He didn't care if there was a crowd now. He wasn't going to let John hurt Erin like that.