Article continues below advertisementMcDonald's latest menu launch isn't just another burger, it's a full-blown internet moment. The Big Arch, a double-patty, sauce-heavy addition designed to deliver a more "satiating" experience, is already generating buzz across social media, not just for its size but for what it says about fast food right now.Described by CEO Chris Kempczinski as a burger with "melting cheese, crispy toppings, and a tangy McDonald's sauce," the Big Arch is clearly built to stand out. And it does.