The track "Useful Idiot" features the sound of the needle skipping at the end of a gramophone record growing louder as the track progresses. The track was set at the end of side 1 of the vinyl versions of "Ænima" as a joke to fool those who owned the version. The song (on vinyl) not only ends in a locked groove, which requires manual lifting of the needle to end playback, but also continues on the run-in groove of side 2.