Also Sprach Zarathustra, for the musical aficionados among us.
When adapting Sandy's short story, I pondered how I was going to convey two famous bits of music having no lyrics. Ultimately I decided to put those piano lessons my parents paid for all those years ago, and my symphonic band experience, to some use. I found a copy of the original sheet music, and adapted them to suit my purpose.
I worried that, since most people don't read musical notation, the joke would be lost. But thankfully, EFT readers are better-educated than most, and since we now post the transcripts (for the benefit of search engines), the problem is ameliorated. (In the print volume I expect I'll have to put a note in somewhere about this, but I'll burn that bridge when I get to it.)