As an example, if he's excited and ready to go out and play and no one can come out, he gets grumpy. Obviously, we see that for what it is, but do other kids respond this way, too? In this example, he may or may not find something else to do, but more often than not he'll express himself by becoming testy and ornery, instead of just waiting it out.
One would think that when someone was able to play and came to get DS, that would be the end of it - he'd go out and play. And sometimes, that's exactly what happens. But then there are times that it's like he gets comfortable being a grouch and just stays on that track for awhile. He's got a knack for getting himself into trouble when he chooses this path and we keep trying to help him see that, to a large degree, these (his mood and actions) are choices for which he has control.
yes, I think my DC can be moody. Or I like to think of it was not being able to let go of the intense feeling, whatever the feeling happened to be.
Or that the feeling takes longer to disappear or work through the system
we try to joke/kid around to get DC out of that mood. Like "Oh no, this is SO terrible. We'll just have to <put drastic action here> and ... " etc So we'll exaggerate the problem and try to make it ridiculously funny... then once there is some laughing or giggling going on, it breaks the original feeling a bit, then DC can move on
(sometimes it works, also depends on if DC was fed or if got enough sleep, if neither, then nothing will work, haha)