Right before going hypo-manic I ALWAYS have a very vivid dream. Not a bad dream juts extremely vivid and interesting. After that I KNOW that the energy filled wacky times will come when I sleep 5 hours WITH ambien, if lucky...and chatter with everybody, while become again very interested in some spiritual venue. All the while I am taking lithium (which admittedly shortens the period and perhaps makes it a little less intense). During phase shifting I too get irritable and easily annoyed or agitated.
When I was not taking lithium I had seen signs in every little thing during episodes like this, having what some call "magical thinking", I have only traces of that left.