Psychosis comprises a screen, a video camera, a computer and a sound system. Using the camera, the computer views what is happening in the gallery and processes the video stream in real time in the manner of a ‘psychotic machine’. The resulting image is projected. The projection therefore displays a psychotic perception of what is taking place at that moment in the installation environment. The projection shows a video feed of the gallery space overlaid with military equipment that the computer has mistakenly ‘seen’ as a result of its psychosis.