biochemical that's probably further fed by life situations, a sense of no control over ANYTHING, tired feeling like a puppet yet the strings hang limp because nobody's pulling your strings in a way that you'd like, and those that DO want to pull your strings are worth avoiding right now.. I dunno. I suggest a night of melancholy music and lots of train-of-thought writing 'til something jumps out at you that seems interesting. Or watch old favorite chlidhood shows. I dunno - just random thoughts that popped up.