A gun with a laserscope is hung from a motor in the middle of a room. The gun slowly rotates, drawing a constant spatial line from point A (the nozzle) to point B (the bullet's potential point of entry), scanning across the walls of the room and across people as then enter the space. Once users realize the red line is draw from the nozzle of a gun, they may duck under it as it passes or break it, consciously choosing to place themselves in the bullet's potential trajectory.