> Or maybe I’m just the only one

not just you - I didn't have a name for it, but my brain pretty much does free-association in that phase. On more than one occasion I've jolted awake because I've had a earth-shattering revelation, only to realise my idea was already invented (hot air balloon) or pretty ridiculous (like having your toaster burn the day's agenda on your toast).

I can't help but wonder: how many multi-million dollar ideas have I had and then promptly forgot as I got into deeper sleep?