Jenna Fischer appeared on The Late Show With David Letterman last night, in promotion of The Promotion, a quiet but good little movie that could use the extra push. After joking with Letterman about the slightly more revealing dress that she opted out of, Fischer talked a bit about recovering from her back injury of last year, taking up jogging, and picking oranges from a tree in the yard of the neighbor of The Office costar Steve Carell, whose house gives her a nice mile-and-a-half route. She also talked about growing up in the Missouri Ozarks, and the popularity of Bagnall Dam and “Party Cove,” all of which culminated with an impression of an animatronic man who guards a mock outhouse (one of those regional things, don’tcha know). She’s still something of a newbie on the talk show circuit, but Fischer’s top-shelf skill with comedically-inflected delivery extends to all manner of anecdotes, something I can attest to, having interviewed her this past week. More on that to follow in the coming days…