In 2012, Green Day released a trilogy of albums, ¡Uno!, ¡Dos! and ¡Tre!. Following their release, Green Day put out a documentary called ¡Cuatro!

Green Day Authority just unveiled an unreleased Green Day song that was recorded for the ¡Cuatro! documentary.

“This little surprise was hidden away in a bonus chapter on ¡CUATRO!, the band’s 2013 “rockumentary” movie that chronicled the recording process of the ¡UNO!, ¡DOS!, ¡TRÉ! trilogy albums. The song is unofficially titled “That Just Happened” after the scene that contained it. (Green Day Authority)”

Check out the unreleased, instrumental song from Green Day: