Over the week, shoppers have been bagging themselves some brilliant bargains in the Black Friday sales.From Nintendo Switches, to TVs and clothing, there's been an offer to keep pretty much everyone happy.But one Black Friday offer in particular has got shoppers talking, and it comes courtesy of Tesco.An image of a supermarket shelf which is meant to contain £15 Harry Potter invisibility cloaks has gone viral on social media, after the cloaks in question were...well, quite literally invisible.The image was shared on social media, and has been liked and shared thousands of times.The tweet joked: "Bargain spotted in Tesco."People were quick to respond, with many people cracking jokes."I brought one but can’t find it !!" joked one.
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