For the group project Metro>polis, curated by Moritz Küng and presented in seven Brussels subway stations, Braeckman responded to the unmistakable transit function of the underground urban network. He mounte a series of black-and-white posters on a long wall in the Brussels South Station, on which one sees the progress of a flash as it reflects on a brick wall. The filmic character of the installation, in which the movements of time and light are central, appeals to the way in which travellers and commuters make use of this underground site: always en passant, en route in a decidedly time-bound context. As a result, the work poetically reveals the ambiguous mechanisms of this underground landscape, which never seems to achieve its ambition of being a fully-fledged urban space.