"all in all it's just a" - "hol ihn hol ihn unters Dach"
"Fetch him under the roof". And it has a nice story to go along with it that the sound engineer mixing the song was German, heard that line and then committed suicide under the roof of the studio because he was reminded of the abuse he suffered as a child in an orphanage.
Total fabrication by the German documentary show "Quarks & Co" to demonstrate how one can be manipulated to hear stuff that isn't there. To this day I can't not hear it when listening to the song.