Easily one of the most bizarre releases from the Pink Floyd catalog is Ummagumma, the first album released post-Syd Barrett that sees the remaining members of Pink Floyd explore the depths of psychedelia and weirdness. With Pink Floyd set to release a major box set that chronicles their earliest years, the band has shared some interesting footage of the Ummagumma original, “Grantchester Meadows.”

Written by Roger Waters, both he and David Gilmour provide guitarwork on the track. With additional keyboard support from Richard Wright, it’s the animal noises that really set this instrumental into the ether. Recorded at San Francisco’s KQED in 1970, this newly shared footage shows Pink Floyd in the height of their otherworldly approach.

The song itself pays tribute to a small English town near Cambridge, evoking the melodies and actual sounds of a warm summer’s day. The song “Fat Old Man” was written later on, by David Gilmour, as a sequel to this unusual instrumental.

Watch the newly-shared rare footage, streaming below.

[h/t Rolling Stone]