I experienced many of your weird symptoms during my mixed episode. The repeating phrases, screaming, black outs, out of body experiences, floating feelings, adrenaline busrts, violence, hallucinations, etc.

I once had a doctor who was treating my mother tell me brain scans of patients in mania look like those in the middle of an epileptic seizure. I believe it. I had pain at the base of my brain where it meets my spine for days before I got sick and then all if a sudden it gave way and I can only describe it as my brain was on fire. Everything happened so fast. The word trauma just doesn't even cover it.