Homeplus, a large South Korean retailer has opened the world's first virtual store aimed at smartphone users. Shoppers purchase items by scanning barcodes of virtual products displayed in a Seoul subway station. They're currently offering 500 items, including food, electronics, office supplies and toiletries at this virtual store. Shoppers can browse seven pillars and six platform screen doors worth of goods. Simply download the app, and you're ready to shop. Click here to view the first image in today's viral picture gallery. Continue reading for a viral video of a cat fighting an invisible enemy.