Mad The Swine! by Queen.
Though it was added to Queen I 18 years or so later.
[QUOTE=AHunter3]
Pink Floyd’s “Embryo” is a quite good track that never got included in a mainstream album.
It’s on Total Eclipse, an off-label compilation of PF oddities & rarities.
[/QUOTE]
As well as Works, although I don’t recall what it sounds like on that compilation, and I bought it just for Embryo!