I've come across this phenomenon, it is the event directly preceding every instance of ego death I have ever experienced, and this is the only time I've ever experienced it. Very interesting.
Here's a past post (under "psoodonym" but still mine) where I describe it to Xorkoth unknowingly:
http://www.bluelight.ru/vb/showpost....&postcount=118
This is really interesting.
Two years ago I had a ++++ mushroom trip, the moment I was torn from my room to an endless sea of energy featured an incredibly strong head surge or zap. Two weeks later, it happened again with a very strong +++ trip. In fact, it happened every time I had a strong trip that year, after the ++++. What's more I started experiencing this effect while in bed at night and completely sober. It almost felt like the 'logos' was drawing me in, only I was completely sober and returned to normal right after the zap. This persisted often for about 6 months after my trip and occasionally for about a year or so.
I had a 7 month break from tripping about this time two years ago, when I started tripping again...no more zaps. A couple of months ago, I took a pretty hefty dose of mushrooms and experienced the zaps again, only this time they were a lot, lot weaker and occurred many times. When I tried LSD several weeks after this, I had to endure 3 hours of continuous electrical surges through my head, coupled with 5 way over sensitization, especially with smells and sounds. My acid trip was really good overall and had no hints of darkness, however for about 4 or so hours it was an extremely uncomfortable state to be in, mainly because of these surges.
I've heard of the zaps before with regards to SSRI withdrawal, I never really connected the two phenomena and just assumed they were entirely different things. Still not sure but the above quote made bells start to ring...
Sometimes, when I smoke DMT in the dark and I'm starting to come down, I'll to stare at my neon green electric clock in a similar way that one stars at a mandala to enter a trance. Soon my entire visual field will dissolve to black (except for the green light), I experience the sounds you describe (not the usual DMT buzz), and I am subjected to an unknowable and unnameable fear that prevents me from looking too long and going too deep. Although, I am curious what I would experience if I kept gazing!
That sounds exactly like when it happened to me on mushrooms; that 'fear' and your vision going to black are exactly what I've felt. The first two time it led to an endless expanse of energy/logos/lifeforce whatever you'd call it. Since then I've either not been able to or not wanted to go there when I've had a 'zap'. It feels almost like my mind is reaching out to the higher plane of psychedelic energy and touching it, my mind starts resonating with the energy producing the zap. If my ego is dissolved/ destroyed sufficiently for it I then become one with that energy, if not then back to reality/the rest of the trip.
This thread has spawned an awful lot of ideas in my mind regarding many of my past trips. When I tripped on acid, early on in the trip I was laying on my bed staring a poster on my ceiling, the poster started to become 3D and my mind felt like it was being drawn towards it. I shouldn't say my mind, because that's not exactly correct - some part of me was being drawn towards it. This was accompanied by a buzz as I approached it, the buzz increased in intensity and then...I started being repelled from it. If I 'approached' again the same thing would happen, in exactly the same manner. I gave up on the poster and put on some psytrance, this was when the overwhelmingly intense sensual stimulation and continuous brain zaps described earlier in my post started to materialize. It really felt at the time, especially the poster attraction/repulsion thing, that I *should* have been going somewhere higher, but (probably because I only had 1 tab and thus my ego wasn't too shrunken) I simply could not.
It's very interesting to note that almost all the trip-related zaps described in this thread have been triggered by DMT based psychedelic; mushrooms, DMT and 5-MeO seem the main culprits. Is it just coincidence that these three (especially the last two) are perhaps the drugs that will send people to a ++++ state the easiest?
This is all just speculation on my part, plus I have no idea how all this would tie in with the serotonin system other than, as someone already suggested, DMT being a hydroxyl group short and two N-methyl groups ahead of serotonin. Am I right in thinking that the pharmacological differences between the two molecules receptor affinities will stem pretty much exclusively from the two methyl groups, rather than the OH group which will mostly just make the molecule more polar and thus more ready to permeate the bbb?
i meant a remedy to counter them during a trip.
Doubt that one exists, at least not one which doesn't greatly dull the trip down at the same time. I would hazard a guess and say that whilst tripping the zaps result (probably indirectly) from 5-ht2a agonism and will thus be fairly as much a product of the trip as the more desirable changes in perception. Could be miles out though.
Cheers