I use regularly AI music services to build rock songs out of my lyrics, old poetry or popular songs, etc. and sometimes they hallucinate in creepy ways, adding after the song ends either evil laughter or horror sounds, demon-like voices, starting singing in completely made up languages. They're creepy but fun and interesting at the same time. Creepy sounds aside, I've had a lot of fun experimenting with AI music hallucinations as they sometimes create interesting and unusual things that spark more creativity (I'm already a musician); I sometimes felt like someone who grew up listening only bad pop trash being suddenly exposed to Frank Zappa.