Pratchett chats lead to leaden lens ringing crystal clear,
[reference to a conversation last night about Terry P. and his driving anger. Lens to imply looking (in reader retrospect, hopefully]
hear a mirror that bends me to it
[my friends' band is practicing downstairs, it's altering my mood while helping me observe it.]
Who's the unfairest one in here?
[reference to the Snow White line, paraphrased to tie some structural bits together, meant to produce image of me talking at mirror]
It's you, you fucking piece of shit.
[darkly comic, self-effacing answer to preceding question. Vague subject.]