Punches and kicks to the air seem to be the right way of releasing the anger he was harboring. Splinter's very absence was taking its toll, and the longer they sit around, the bigger the chances were that their master may be gone permanently. Doesn't Leo understand this? They can't stay stationary. Giving grunts and groans of frustration, Raphael sighed, shortly before he heard the voice of Charlotte, a short ways behind him. What was she doing here? 

Looking over the side of the building, and over at the streets below, he didn't answer her, but rather, gave a sniff; whether out of sadness or anger, the rebel shook his head, trying to force these troubled feelings to just disappear. Her words were launching towards him, and he didn't look at her. "He's out there; I know it", he said, seemingly ignoring what she was telling him.