I'm not the most experienced meditator, but frmo what I understand...
Ident Silence:
On Tuesday night, while engaged in vipassana meditation I believe I passed through what I think was an A&P event. This is more of a question of clarification here, basically I experienced very similar sensations to those of a Kundalini experience ie. highly sexual imagery and sensations, like flames from the coccyx (Mulahdara chakra, to use the language of that system) to my cranium (Sahasrara) accompanied by intense vibrations similar to an orgasm. All in all it was fantastic and all that but, easy as it would be, I hold no attachment to it and noted each sensation as it arose and passed. Would I be right in thinking that this is the 2nd vipassana jhana?
It does sound like A&P, yeah. Good to hold no attachment to it as it fades, as you saw.
The feeling of being unable to keep still seemed to dominate much of the time as did the inability to drop the content from thoughts and just observe them. Aimless irritation, anger, frustration and disgust came and went with intensity and at one point I felt close to tears.
I bolded the parts that are close to what I have experienced. I think that is Re-Observation.
I focussed on the sensations of breath but had to fight to keep the attention on each breath, noted, noted, noted and noted but by the end of the session I felt like I'd just had the shit kicked out of me. Whoever said that meditation was all sweetness and light deserves a slap in the chops!
What helped me get through it was not to ignore it / focus away from it. That made it worse, for me, as then I wouldn't observe what I wanted to as I thought was proper and that got me even angrier. I don't know if this is good advice, as I don't seem to have had any particular "object of focus" in my meditations, but I just focused on the anger, focused on the things that caused the anger (since, for me, it was a variety of things in my daily life that I kept thinking about that got me angry), and realized that they are not me, and that they are suffering - or at least, my relating to them that way was suffering and not me. It might be obvious from all the anger but thinking about it that way helped.