Thank you for sharing this eloquent articulation eternity - my first thought was "I hope you didn't have neighbours to freak out

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To me the body's physical reactions are quite fascinating and I often get the rhythmical toe or foot action going too. Some suggest that this is a deep process of aligning the energetic body ('chakras', 'Chi' or 'prana'- much is made of these terms that may or may not be so) and I feel the 5-MeO experience is a direct revelation of such forces at work inside the human vessel. You seem to have had some very powerful and consistent re-activations and have integrated them with wisdom and grace, as they can be quite confronting for some (especially having no fore-warning of such phenomenon). I have found that this intense physical vibration of body precedes the infinite state, as though imbalance is being cleared in order for pure consciousness to flow...after this, the body still moves autonomously or seemingly independent from 'cognitive mind', but the motion is smoother and more fluid like a dance.
Am I really ready for it, can I really hold something like that, can anyone? why should I do it again? why do I want to go through it again? will it help me? and also very importantly should i recommend it?
All very important questions to posit to oneself. Knowing when you are ready for it again will be a very intuitive gnosis, in order to distinguish itself from the chasing of the experience... increased synchronicity can often be an indicator. The motivation for doing it in turn becomes ones intention going in, which then allows for a focus point and channel for certain lessons to come through in certain areas of our lives, revealing themselves as most pertinent areas of concern for us. It will help you as much as you want it to help and this will be a matter of discerning what medicine suits a particular type of issue at any given point for you and which medicine is presenting itself in response to you being ready.
As to whether one can ever 'hold on to' an experience like that, I think we are inherently attuned towards trying and even though we know we cannot fully articulate the ineffable, the desire to do so is a fundamental driving force behind the creative impulse of humankind. I would suggest that we honour the experience by attempting to stay open to it (this may be part of why re-activations occur), by removing blockages to the flow of 'spirit' or 'pure consciousness' in our lives, by living as honestly, kindly and gently as possible in our interactions with our inner selves, loved ones, strangers, community and the land.
peace,
Flux