The phrase wers glaubt wird selig is a long established German idiom used when someone hears a claim they clearly do not believe, roughly matching the English yeah right. This Diane clip isolates that expression as a short, shareable reaction sound, which helped it circulate in meme edits and chat replies rather than as a full scene. Its appeal comes from how specific the wording feels while still fitting countless situations, from tall tales to weak excuses, so creators keep reusing it whenever disbelief needs to be expressed quickly and dryly.