All in all, it was all just bricks in the wall. All in all, you were all just bricks in the wall. This may be one of my favorite albums of all time, and, although I don't see any obvious connection to the song, I can say that it certainly fits the themes.
Lolnope. Comfortably Numb says "Is there anybody in there." Hey You says "Is there anybody out there," but there's also a song that, in whole, is nothing but that line, followed by instrumental, and it is entitled "Is There Anybody Out There."
"Go ahead, keep calling out. Yell with all your might; for there is no one here. If you think you are all alone, then you've never been abandoned or forgotten. You are just in a place that is simply empty, that no one else is in, or around. If you'd like, I can show you what it means to be truly alone..."