Lyric discussion by Tucker 

Cover art for No One Knows My Plan lyrics by They Might Be Giants

This is a song about a guy sitting in a prison cell and planning to take over the world. He was "careless" and let the people around him know he was planning to overthrow the government, so they had him arrested.

This guy's probably writing a book while he's locked up, and that is the "angle" and the "blueprint" he is working on. He's also an artist, because he's sketching autumn leaves. He thinks he's a great philosopher like Plato, but really he is just a crackpot.

The dancing and shouting and lovely music and burning autumn leaves foreshadow something that the crackpot and his whackadoo friends will do when they get together in September for their big party day, and also because the crackpot who's planning stuff was arrested in November. The shrieks of pain foreshadow the effect the guy's plan will have on those around him.

(The identity of the imprisoned egotistical artist and pseudo-philosopher who is planning something terrible is left to the reader's imagination, of course....)