It's 35 degrees in the shade at the edge of Berlin's Forckenbeckplatz. In a street nearby, a plastic UNFO (unidentified non-flying object) hangs from a thin strand of wool just above the shop front of Salzig – Sporthocker. Michael Landschütz welcomes us all smiles, between a pile of cardboard boxes and a wall of multi-coloured UNFOs. But they’re not unidentified for long, for it turns out these are the famous stools themselves. Two flat circles joined by a plastic tube look like chairs when upright, but have the form and instability of a wheel when on their side. It’s essentially a multifunctional object, but above all it’s designed for a sport. ‘Hocker’ is German for 'stool' or 'taboret', and the sport consists of using the said-seat like a skateboard - except that the player can use their whole body and finishes their moves in a seated position. Or, as Michael would have it, ‘Hocker is the perfect combination of skating, juggling, dance and break-dancing. But then it’s different again.’