Zach Galifianakis is a straightforward kind of guy. When James Corden tells him to “come back anytime,” he does, anytime, because why would someone say something he didn’t mean? So sorry, James, if Galifianakis’s down-to-earth realness in following through is too much for your Hollywood sheen to endure, but whose fault is that, really? Corden’s literal job description is host; if he can’t handle unwelcome visitors with excessive hospitality, who do we have left to turn to for undue civility under siege? Jimmy?