 Cage met Kaprow while on a mushroom hunt with George Segal and invited him to join his class.In following these developments Cage was strongly influenced by Antonin Artaud's seminal treatise "The Theatre and Its Double", and the happenings of this period can be viewed as a forerunner to the ensuing Fluxus movement.In October 1960, Mary Bauermeister's Cologne studio hosted a joint concert by Cage and the video artist Nam June Paik, who in the course of his "Etude for Piano" cut off Cage's tie and then washed his co-performer's hair with shampoo.