In the album version of "Nobody Home", the television in the background is airing an episode from Gomer Pyle, U.S.M.C.. When Pyle delivers his famous catchphrase "Surprise! Surprise! Surprise!", Waters (as Pink) immediately follows it up with the line, "There's still nobody home".
'Go on, Judge, SHIT ON HIM!'
The DVD Commentary by Roger Waters and Gerald Scarfe is a fountain of these:
During the animation of the flowers in the song "What Shall We Do Now?":