There were two things that became apparent, pretty quickly...

There were two things that became apparent, pretty quickly into the process. One was that the muscles didn't take as much reconditioning as I thought they would. It was more like voice acting than I thought it would be. You're using your whole body and there are things that are different, but when you are doing a character, even in the booth, nobody is watching but my face will do different things when I do different characters.