Every Halloween, millions of cat owners stuff their pets into floppy, sad-looking costumes — spend twenty minutes readjusting — and still end up with a blurry photo of an irritated cat and a drooping rider hanging sideways under its belly. Here's what's different this year. Cat owners across America are going viral with a single costume that actually stays upright, looks insane on camera, and fools every single person who sees it. It's called the Headless Horseman Cat Costume — and once you see it in action, you'll understand why it keeps selling out.