"in another moment, Jethro Tull erupted again, shutting out all else."

British rock group Jethro Tull were in their prog rock phase at the time. Their 1972 album, Thick As A Brick, was conceived by lead singer Ian Anderson as "the mother of all concept albums" and reached number one on the US Billboard Pop Albums Chart.

Jethro Tull – Thick As A Brick (Part 1)

Jethro Tull – Thick As A Brick (Part 2)