Mood Disorder documents the propagation of a photograph of David Horvitz across the internet. The image-a self portrait of the artist with his head in his hands, ocean waves crashing in the background-was initially uploaded to the Wikimedia Commons, and placed on various Wikipedia pages. From there, the image began to circulate, appearing on over a hundred websites as a "stock"" photo to illustrate articles on a wide range of mental health and wellness issues."