[@dreamingflowers]

In Kyle's CS, I've described his condition as "mood swings". 

From the CS: [i]"At one moment he might be fine, just chilling, and the next, he might lash at someone or something for the most random of reasons, and after he's done raging, he will return back to his relaxed, chill self, as if nothing ever happened. Mind you, this is not restricted to only anger, no. The chances of him turning sad, or cold, or happy, out of nowhere are as high as him getting angry."[/i]

But the thing is, from what I read, bipolar is not about your mood being all over the place constantly. Yes, you might cycle through emotions on a fast rate, but there are specific emotional states that you cycle through: Mania, Depression, and Mixed. And it seems that each episode lasts at least a week or so, so Kyle's "fast mood changes" doesn't quite depict, in my opinion, the overall severity of the situation.