rialtoscuro

n. the disorientation of stepping outside a movie theater into unexpected darkness—a twinge of jet lag after letting your mind escape to some other world for a while, only to be thrown abruptly back into reality.

Italian rialto, a theater district + oscuro, dark, obscure. Compare chiaroscuro, which describes a quality of visual art that emphasizes the contrast between deep shade and bright light. Pronounced "ree-al-toh-skyoor-oh."