Treat this thread as a cupboard under the stairs in which to put little odds and ends that you've maybe always puzzled over and wonder if anyone else has.
An example might be this thread
Another would be a thing I've pondered since I was about 12, and which I've mentioned elsewhere on this board (but I can't remember where), which is about the indistinct bit of vocal far back in the mix in Lilywhite Lilith, just after the line "by whatever's coming here". It was suggested it was a bit of PC backing vocal, though it sounds like PG to me, and it has the intonation and cadence of words rather than scatting. And it seems to have been made more distinct in the 08 remaster, but still unintelligible. And just before that, right at the end of the word 'tunnel' ("I can see the corner of the tunnel") there is a single syllable again mixed quite far back, making it sound like "tunnel-(ah)".
In the second percussive breakdown in Keep It Dark, before the line "Oh keep it dark" there's what's always sounded to me like a low vocal 'grunting' in time with the percussion, a sort of "uh-uh uh-uh UH-uh" but might be a chance effect of the combination of percussion sounds. Is it?
And why on Man On The Corner does he pronounce 'for you' as "faow you"?
And in the Cage medleys on the 'holding still, pinned for kill' line, what does PC sing instead? I wondered if it was some in-joke as it sounds a bit like "[something] Phil, Chester [something]"
And also, wh - oh never mind I'll shut up now.