In 10 x 10 (2011), a camera appears to track downward through a building passing room after room, floor after floor, to witness the unseen, and sometimes unseemly activities and ephemera of office life – Spiderman hoovering, a skewed pile of office chairs, a man riding a bicycle, a huge heap of shredded paper, a man lying on top of a filing cabinet, a scattering of illuminated fluorescent tubes…