It is difficult to suspend a concrete monolith weighing over 300 grams at a height of 95 cm using two chestnut tree trunks and a Yugoslavian hemp rope. Have you ever heard of the annual stone hanging ceremony in the Taunus mountains? No? Then take a look at "Der Stein" (The Stone), where five-year-old Ole Heidekamp will explain what it's all about using scientific terminology.