Kind of surprising they didn't go with "Another Brick in the Wall, Part 2" instead. Part 1 is very low key and doesn't feature much of a recognizable melody. Musically, it doesn't really stand on its own, it only works as part of The Wall as a concept album.

Part 2 has a recognizable melody and it includes the iconic chorus "We don't need no education". If you've grown up in western culture, you've probably been exposed to Part 2 through cultural osmosis even if you're not a fan of Pink Floyd or classic rock.

Why not Comfortably Numb?

“Hello? (Hello? Hello? Hello?) Is there anybody in there? Just nod if you can hear me Is there anyone home?”

While admittedly a popular song, I'd argue it's not the epitome of Pink Floyd.

I'd like to see them do this experiment with Brain Damage/Eclipse, climax of Echoes, or Celestial Voices.

Damn it, you beat me to this joke. Have a star: *