 Another example is found in Roger Waters ' 1991 album Amused to Death , on which Waters recorded a backward message , possibly critical of film director Stanley Kubrick , who had refused to let Waters sample a breathing sound from 2001 : A Space Odyssey . The message appears in the song " Perfect Sense Part 1 " , in which Waters ' backmasked voice says , " Julia , however , in light and visions of the issues of Stanley , we have changed our minds . We have decided to include a backward message , Stanley , for you and all the other book burners . " 
