23-minute song “Echoes” by Pink Floyd (Crystal Voyager version).

Crystal Voyager is a 1973 Australian surf film directed by David Elfick. The closing sequence, Greenough’s short film Echoes, is generally considered to be the highlight of the film. Filmed with a camera in a waterproof housing strapped to Greenough’s back, the sequence is composed entirely of slow-motion footage shot inside the curl of waves, edited to the 23-minute song “Echoes” by Pink Floyd. The group reportedly allowed Elfick and Greenough to use the music in their film in exchange for the use of Greenough’s footage as a visual background when they performed “Echoes” in concert.

Bonus: Full movie ->

A loose biography of surfer and documentarist George Greenough, one of the most famous and unique members of the surfing subculture.

Crystal Voyager is a 1973 Australian surf film directed by David Elfick. It was filmed by Albert Falzon, written and narrated by surfer, photographer and filmmaker George Greenough who had previously made the 1970 surfing film The Innermost Limits of Pure Fun.The soundtrack was written and produced and performed by G. Wayne Thomas and the ‘Crystal Voyager Band”.