Have you ever run up and flipped off one of the columns outside of Dietrick Express or vaulted over a wall? If you have, you may be able to call yourself a free runner or a traceur (French for ?tracer ...
Tim “Livewire” Shieff is a stocky young chap with forearms as thick as tree trunks and a neck to match. He stands on a railing at the edge of a platform some 20 feet (6-m) above a north London stage.