Yes!
(
disinterested documentary commentator voice:) "In the immolation scene, Brünnhilde is about to call for her horse Grane and urge it into the flames as a final gesture of sacrifice. The recording team thought that at the end of this great epic, it might be a good gag to produce a real horse." <images of a horse mounting the stairs of the Sofiensaal> <Nilsson:
"Grane! Mein Ross! Sei mir gegrüsst!"> <horse enters recording platform> <Solti:
"So! Schön ja. Das war sehr raffiniert.">
This could only happen in the olden days, could it?
And George: 'Sviatoslav Richter and Rita' - what a pair! Thank you.