This is consistent with my anecdotal experience. I sleep a lot more when I'm angry, frustrated and overwhelmed. It's a vicious cycle. It's pretty cruel. The inv

This is consistent with my anecdotal experience. I sleep a lot more when I'm angry, frustrated and overwhelmed. It's a vicious cycle. It's pretty cruel. The inverse is also true: I'm alert and chirpy when I'm "on the ball". Also interesting to read the comments: "It is a commonplace among cops that a suspect who falls asleep while awaiting interrogation is almost certainly guilty. I think this is a related phenomenon." "I've had this response - after a particularly heated argument with my mother. After leaving her house I began driving home and actually had to pull my car over, get in the back seat and sleep for about thirty minutes. It stands out because it was so odd, overwhelming and had never happened before."