Grateful Dead HQ offered a belated Mardi Gras celebration with a newly released pro-shot clip of “Iko Iko,” filmed live at California’s Shoreline Amphitheatre on Sept. 30, 1989.

“Although some early versions of ‘Iko Iko’ appeared out of ‘Drums’ and ‘Space,’ by 1984 it was primarily a set opener, both the first and second sets,” explains GD legacy manager/archivist David Lemieux. “Whenever those opening notes of ‘Iko Iko’ opened a first or second set, it felt like party time was starting, and a fun set was coming up.”

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Watch the 9/30/89 “Iko Iko” below: