The song is an unusual Beatle composition for a variety of reasons, namely its length (nearly eight minutes), its disproportionately small number of lyrics (only fourteen different words are sung), its three-minute descent through the same chords guitar playing (a similar arpeggiated figure appears on Lennon's other contributions to the album "Because" as well as McCartney's "Oh! Darling"), its hard rock sound, and its instantaneous, unforeseen ending. It is also one of the last songs the Beatles mixed as a group, on August 20, 1969.
But in the end it ends up being a very interesting song
