From the moment of its inception, it has not been clear whether Laterna Magika (LM) is film, theater or a brand-new media performance show. First introduced in the Czechoslovak pavilion at the 1958 World Expo in Brusse...展开ls, this entity combined ballet, theater, several film projections, and sound background. LM transformed the concept of virtual and physiological time. The medium of virtual time included a real actor with whom the spectator could identify and thus gain a direct paradigm on which to model his own behavior, should his physical body ever find itself in a virtual interactive space. It was a highly synchronized program, coordinated to the last detail, with everyone having his exact spot in a precisely marked space.