This documentary https://www.imdb.com/title/tt16058448/ https://www.imdb.com/title/tt16058448/ has a part towards the end where mics are setup deep inside of a

This documentary https://www.imdb.com/title/tt16058448/ https://www.imdb.com/title/tt16058448/ has a part towards the end where mics are setup deep inside of a remote cave in the mountains. The sounds they picked up were supposedly those of rocks cracking from tidal effects from the moon. Crazy stuff.