I have problems with most "instant" delivery systems (IV or smoke) with psych's...I've smoked DMT, and done IV LSD, and the effect with Salvia is pretty much the same for me...(IV LSD may have been the worst of all, because you don't 'come on' your just , BAM, there, peaking your ass of, without the benefit of a climb or adjustment)...Salvia, when taken in liquid form (sublingual), is so much friendlier for me. I have to say, in about 10-15 min, I'm in Heaven on Earth, thats the only way I can describe it. They merge for me.
Depending upon the dose, it can be mildly euphoric (great for deep meditation), to out and out mind blowing, and the last adventure (this past Wednesday) was probably the the most vivid so far, on the least amount done...(it was a new shipment , I don't know if the potency varies, but it seemed stronger than ever)
If by 'gravity shift' you mean the pulling force, I definitely feel that. It feels to me that I 'm almost being thrown back, but only in a, 'sit back and enjoy this' way... I'm usually sittng on a sofa, or sitting up in bed, and am totally encouraged to 'lay back' by gravity.
It was fairly overwhelming, and this time was the 1st time I felt a bit of resistance to it, because it came on so strong, but I realized i needed to let go and give in.
It feels just as nice as some of the strongest LSD I've ever done, the visuals are exquisite, (even with my eyes open), and that intense 'oneness' that accompanies most of these types of drugs. (To me, there is no question, it is a psychedlic, but call it what you will.) Although during the 'trip' I don't like light or music or any sounds other than the internal sensations. (Later tho, music is a nice accompaniment) and, as with many of these type experiences, all my realizations were very apparent at the time, and shortly thereafter, I suppose, assimilated into my 'normal (for me)' consciousness.
I'm an idealist by nature, and when I go 'there' it all works fine, and all is perfect, for a day or three. After that, I find I'm very disenchanted with the world, and many of it's inhabitants, I'm not very tolerant, so I tend to stay close to home...seeing "Charlie Wilson's War" wasn't an ideal exposure for me this week, and the presidential nominations are a must to avoid at these times. Today, I'm back to taking it in stride, and wonder how much longer I can avoid the monastary, because at this rate, it surely seems my path..lol