Transporting a grand piano across a rope bridge, for example. The crushing impossibility of it. Or an unwashed finger. Or the scaffolding of bones and tissue inside an average finger. Or a worm from the perspective of the falling spade. Or two presences swirling around an absence. Or a material fresh from Science, built at the nano scale from pinwheels and what look like castles, your defeat engineered at a level completely inaccessible to you (but one at which you're unfortunately very present). Or snow falling past a streetlight. Or ants streaming from a nest. Or sunlight streaming through your unresponsive pupil. Or the yawn of a policeman. Or the yawn of an unspecified wound. Or sand. Or spit. Or trillions of grey particles moving randomly in a blue space. Or a finger pushing against a light switch. Click.