😆 I'm picturing Tony maxing out his stone-face as he listens to the noise, and Peter and Eno backing slowly away.
Banks was certainly sniffy about Eno's contributions, and is reported as having irritably reacted to his being credited when "he just twiddled a few knobs" but PG & PC insisted he be acknowledged.
Good point re the fly-like 'buzzing' over the piano intro, I've always noticed it but never wondered any further about it other than idly thinking it might be a guitar effect. The idea the piano would morph into noise is amusing.