I’ll start off with a response to Justintime’s post:
When I meditate while on mushrooms, I often slouch as I lose all contact with my body, often I can watch my mind-created world (including sense perceptions, forms, everything) deconstruct itself while simply being in awareness.
In meditation you should fall deeply into nothingness yet still be fully aware.
It's very natural to allow your chin to fall onto your chest. It isn't the most comfortable position but the typical straight necked mediators attention is distracted by staying straight (head upright, neck straight).
I'm convinced that it isn't just the ego that does the distracting but these energies just an arms length from us that desire the emotional response as a form of energy to harvest from us and so practicing a refusal to become emotionally charged by thoughts eventually rids us of these outer energies and our minds become so much more silent and peaceful.
A couple weeks ago my awareness naturally pulled away from this body/mind several times. It was also interesting to find myself watching the physical tensions in my body as an object of meditation
Last night’s meditation was completely sober. I noticed a huge difference in relaxing into it when my family was all sleeping, the normal busy-ness, thoughts, movements of my surroundings seem to play a big role.
I also was able to notice more body-tensions especially through the front of my head/ in my face. The tensions seem to be mind-created as I notice more. For example I have a difficult time sitting cross-legged because of extreme tightness in my legs/hips, probably due to all the sitting in the office everyday. When my body relaxes while meditating, I can sometimes find my hips & legs loosen and be able to sit more comfortably...the only thing changing is the state of my mind.