Bipolar has two parts.... the UP of mania, and the DOWN of depression, as well as its two diagnoses: the BP1 with high mania, and the BP2 with hypomania. It's a twofer all the way around.

Of course, many of us start out with being diagnosed with depression, get fed an antidepressant, and then go off the deep end of mania -- voila, instant bipolar diagnosis!