Slipknot's got people talking and it sounds like a proper mystery campaign is unfolding across the world. If there's a tour announcement brewing, it's exactly the kind of thing that gets the Cledvibes Radio listeners buzzing, especially if those cryptic posters are making their way around London. Sometimes the old fashioned poster campaign beats any amount of Instagram teasers, and Slipknot clearly know how to keep their fanbase on their toes.