I'm talking about the very end, long before the song is over, keep listening and somehow a segment of a telephone call is clearly audible. I know their albums are filled with little snippets here and there, most of them hidden, a lot of them just really apparent. This just seems weird, cause it's the last song in the album that will most probably end it all. Just listen to High Hopes in The Divioson Bell, and keep listening right to the very end, and you'll spot it.

See ya, the black and green scarecrow is sadder than me!

__________________
who are you and who am I
to say we know the reasons why
some are born and some men die
beneath some infinite sky...
so all things time will mend
so this song will end

Gilmour in 'Childhood's End'