Olafur EliassonMirror door (spectator), 2008; Mirror door (user), 2008; Mirror door (visitor), 2008Installation at The Museum of Modern Art, New York, NY, 2008Photo: Studio Olafur EliassonCourtesy the artist; neugerriemschneider, Berlin; and Tanya Bonakdar Gallery, New York© 2008 Olafur Eliasson