I thought this would be a good time to stop and reflect on the Super-O as it is called. I already have experienced quite a few of these. Although no two have been exactly the same, there are some similarities.
First off, the Super-O is similar to the normal penile ejaculation only for a few seconds. Since it is a "dry-orgasm" for the most part, there is no refractory period. Thus, it is possible to have multiple sequential prostate orgasms in one "session" and I in fact have had probably up to ten at a time.
What happens during a Super-O? That is really a mystery of my body, since no two have been exactly the same. I have experienced at one time or another: involuntary muscle contractions, whole-body shaking and movement, uncontrollable erections, total body paralysis (a little scary), out-of-body experience, complete memory loss (or fog), flashing colors, uncontrollable emotions such as crying, extreme warmth of body, foggy vision, 'phantom' ejaculate discharge, and probably a few things which I experienced but did not remember clearly.
During a recent Super-O, I distinctly felt the pleasurable interaction between the stimulator contact with the prostate and the P-tab. These two pleasurable "feelings" set-up a feedback loop that continued to build into the Super-O.