It's one thing to be on the hunt for a funny dog costume for Halloween, but it's a whole other ball game to want something so creepy that it might disturb you and your dog at the same time. And that's exactly where we'd file the Frisco Tarantula Spider Dog & Cat Costume ($15). Complete with with a hairy body, eyes, and long, spiny legs, the costume is yours for the taking. And since it comes in six sizes, you can terrify your Golden Retriever and your Yorkie — the possibilities are endless. Good luck getting them to forgive you for this, though.