Famously starting with all kinds if chiming timepieces, Waters explained that the lyric was prompted by a sudden realisation in his late 20s that he was now in the thick of life rather than preparing for it. It takes over two minutes of nonetheless worthwhile, drum-oriented intro for the recognisable vocal melody to kick in. But it’s well worth the wait. A perfect example of how Floyd can bring two entirely different moods to a song and somehow make it work. Lovely guitar solo from Gilmour too.