The fans of the Liverpool Football Club contributed to this recording. That's them singing "You'll Never Walk Alone", an unofficial anthem of the club, in an on-field recording. It's the type of thing that could give you goosebumps. And does, for me, every single time.
The song itself is a great illustration of how innovative and ground-breaking the band actually was. Nick Mason's ecclectic drumming, Roger Waters's odd guitar tuning, Richard Wright's orchestral piano, and David Gilmour's quiet vocal, with practically Sisyphythian lyrics, all combine for a unique, compelling, and inspiring song.
Although only released as a B-side, "Fearless" has become a fan favorite song, and is my favorite Pink Floyd song. It is not, however, a song they performed live - save for some dates by Roger Waters in 2016, nearly 50 years after its release.