Der Schlaf IV (y-drops) (2006) is an ominous installation in greyscale, consisting of a painting, a framed sheet with a crossed line and needle pricks, and chandeliers made out of fluorescent tubes. Sleep (the English translation of Der Schlaf) and the dark realm of the unconscious are referenced in the title and the mountain topped with sexually charged shapes painted in black. The framed sheet, with its unreadable message, points to indecipherable depths of dream logic and the impossibility of understanding even with the help of the bright lights overhead.