My Circadian Rhythm (inner clock) has been out of order for 5 days..most scientists believe that Circadian disfunction is one of the reasons why people get BiPolar (along with BP genetics) Mood & sleep are regulated in the same part of the brain..so if your sleep cycle gets messed up your moods get messed up and vice versa. I gotta tell ya, I'm enjoying it!..just like a swift kick to the teeth.