The chest X-ray was from a premature infant being ventilated in the neonatal unit for hyaline membrane disease – the lung disease of prematurity. The endotracheal tube had slipped into the right side and was blocking the left lung. This caused the right side to be over inflated and the left to be smaller. Fortunately the tube position if discovered early is easily and rapidly rectified, so the overall effect of the image is hopeful. The X-ray has been segmented using pixel density and multiple segments removed, nevertheless the black right lung can easily be differentiated from the collapsed left lung. The chest X-ray overlies loops of rusty coiled steel cable in a pile of leaves. The loop divides the right and left side of the picture (using medical side allocation which is the opposite to normal arrangement) into the cooler (and larger) right side, and the smaller, brighter and more active left side. The colours similarly are the opposite of the densities seen on the X-ray.