John Cage was not only a major figure of the musical avant-garde but also an avid mycologist, collector and consumer of mushrooms. His knowledge of the fungal world was legendary. In 1959 he even won 5 million lire on an Italian TV quiz show with mushrooms as his specialty subject.

Indeterminacy was a lecture performance work in which Cage recited a series of one minute stories and anecdotes in no particular order. Many of these stories related to his love of mushrooms and his experiences of collecting and studying them.

http://www.mundusloci.org/fungus/culture/cage2.htm