As a child, Charles would often put on a puppet show for himself as entertainment. His mom would then tell him to "save it for the stage," foreshadowing his futre as a performer. It could also be the idea behind the title of his one man show.
Charles: When I die, it's going to read, "Game Show Fixture Passes Away." Nothing about the theater, or Tony Awards, or Emmys. But it doesn't bother me.