I have this idea stirring in my mind that I'm writing down here before I forget and don't do it.
It'd be a long song called "The Fluidity of Dreams". The idea is that the song shifts (changes tempo, key, instruments seemingly at random) just like a dream. I've been having vivid dreams, but the stuff that happens in the dreams change often, and it interests me enough to consider writing a song about it.
Also, Keanu Reeves is the Spider King.