I've experience loss of bad things that happened that invoked a mixed mood, a like out of control pissed of manic, depressed state.

With that said, I laughed at being handcuffed and smiled through funerals, and cried through birthdays. So, as I've dscovered, moods can be triggered or automatically coincidental. As an ultra rapid cycler, I'd have mood changes right at the moment of a stressful event whch I often wondered what REALLY caused the mood change to begin with.