The song is an unusual Beatles song for many reasons , its length ( nearly eight minutes ) , small number of lyrics ( only fourteen different words are sung ) , three-minute descent through the same repeated guitar chords , and sudden ending . This song is an unusual Beatles ' composition for a variety of reasons , namely its length ( nearly eight minutes ) , few lyrics ( only 14 different words are sung ) , 3-minute descent through repeated guitar chords ( a similar arpeggiated figure appears in `` Because '' , as well as McCartney 's `` Oh !