Via Firesign anarchist^H^H^H^H^H^H^H^H^Harchivist Taylor Jessen:

Richard Metzger from the "Dangerous Minds" blog interviews Phil Proctor
about "The Firesign Theatre Radio Hour" on WFMU and the origins of their
radio adventures, 1970-1972:

http://www.dangerousminds.net/index.php/site/comments/phil_proctor_forward_into_the_past_with_firesign_theatre/

If you dig a hole that's deep enough,
everyone will want to jump into it.
  -- Firesign Theatre