The movie, *#GlassOnion* is taken from a Beatles song. That's actually the song title, too.
I've heard it a thousand times over the past 50 years, sung along ... never caught those lyrics, until the subtitles at the end of the movie, playing over the closing credits.
I always thought the line was "looking through a glass undone" ... I thought it was, like, "thru a glass darkly" or a sort of "thru the looking glass" reference.
PS: Good movie, great time to watch it, as it is primarily a blatant critique of Elon Musk, "influencers" and that whole "Jobs-ian" cult of personality thing.