His "Self Portrait as a Fountain" (1966) shows the artist spouting a stream of water from his mouth. At the end of the 1960s, Nauman began constructing claustrophobic and enclosed corridors and rooms that could be entered by visitors and which evoked the experience of being locked in and of being abandoned. A series of works inspired by one of the artist's dreams was brought together under the title of "Dream Passage" and created in 1983, 1984, and 1988. In his installation "Changing Light Corridor with Rooms" (1971), a long corridor is shrouded in darkness, whilst two rooms on either side are illuminated by bulbs that are timed to flash at different rates.