[Shiro didn't interrupt while Kieth explained what he had been told about his arm. Given the amount of damage his hand could do, he was relieved to hear that whatever technology they had here could heal Keith's arm]
Let's go back to the apartment. That way you can rest and take something for the pain.
[He guessed it hurt. His hand could cut metal; unless they had really good stuff there, there was no way it didn't hurt]