I do enter an agitated state of depression sometimes somewhat similar to what you describe. I want to lash out and tell the world What It Is All About, etc. I have often felt this may represent a bit of lurking dysphoric mania, a mixy thingy, maybe, as the externalization, as you interestingly phrase it, us such a big part of hypo and mania for me. Everyone must hear about it. So on. This is sort of a depression-mania subtype for me, at least, this is how I presently make sense of it.

Hugs.