Add Yahoo as a preferred source to see more of our stories on Google. There’s an art to guiding museum tours — and this guide is one very haughty artist. A staffer at Düsseldorf’s Kunstpalast art ...

He calls himself 'Grumpy Guide' Joseph Langelinck, and his museum tours at the Kunstpalast in Düsseldorf are booked out for months. His recipe for success? He insults and humiliates his customers.