Good descriptions here. There was one thing I've had that I didn't see mentioned (sorry if I missed it) though and that is that along with tons of SI, -- thinking *about* it -- I "see" myself in the place I think of it happening, dead. Over and over. It sucks.

In my worst mixed episode (2012), the vision kept coming to me in black and white. That was weird.

Other than that particular aspect, I'd say it's like an electric current of super dark energy. SO much energy, SO dark and negative. Everything, all at once, going on and on and on. Like BipolaRNurse so succinctly said, "Hell. Pure unmitigated hell."