This stinger comes from the Law & Order television franchise and became widely recognized through years of episode transitions and dramatic scene punctuation. Online, people usually call it the Law & Order dun dun, SVU dun dun, or doink doink. It spread far beyond the show in memes, TikToks, and reaction edits because a single hit can instantly frame a clip like a crime procedural. Its lasting appeal is simple: viewers understand the joke immediately, so even mundane moments feel comically serious.