In 360° Presence, a rough steel ball starts moving when a visitor enters the space. A sensor detects physical presence and keeps the ball roaming the room as a violent manifestation. The size and weight of the ball creates a sense of hostility as it bumps into or slides along the walls. The visitor seems to have no control over or effect on the movement or direction of the ball, and is thus left without possibility to stop the aggression imposed on the space and himself.