The song "I am the beat" by the band "The Look" is notable because when it was issued as a vinyl single, it was engineered so that the run-out groove, rather than silence, contained the word "Beat!..." which looped until you lifted the stylus.
Is there a way of achieving the same effect using modern music delivery systems? In other words, is there any way of creating an audio file or stream or CD or whatever that can infinitely loop its final second of audio?