First off, meditation can cause some very bizarre phenomena, sometimes of a 'set type', so to speak (i.e. phenomena that can be replicably described
by different people), sometimes of a manner that is purely subjective and individual.
Such experiences are always outside of the realms of everyday perceptions.
Now, I am not going to be able to back any of the following up with any solid facts or sources for reasons that will hopefully become obvious
throughout this post, so take it with as many fingersfull of NaCl as you deem necessary.
I'll start off with some basics (as far as meditative experiences go, not
just meditation basics).
Everything you experience is just that, an experience. Subjective and rationalised toward your ego. What you experience reality as, as your ego, is
not what reality actually is. It is just your individual, egoistic interpretation of reality.
When you meditate, you break away from your perceptions of reality and start looking towards what reality actually is.
This (what you see around yourself) is not reality, but information about
reality. Imagine that there is a creature running around under your
carpet, leaving bumps and tunnels in it's wake. In the hope of trying to understand our reality, we keep looking at the bumps, not knowing the the
thing we should be
looking at is the 'real reality' that made the bumps appear. It is just under the surface of what you see around yourself, hidden from you only by
you not knowing that it's there.
You, personally, are the thing that made the bumps appear.
You personally, are Infinite Awareness having an experience of what we think of as reality, but not knowing it.
Everyone and everything is a manifestation of you. Your shine, your display, your creative play. As liquid, ice and steam are all three states of
water, so this reality is an illusory state of a very small part of You.
As you already are It, there is nothing you need do to become It, other than remember who You really are. This recollection of your True Self
eventually erodes the power of this reality to dominate your perceptions, and slowly you come to perceive not from one side or the other, but from
both as aspects of your single state, you have an experience of Enlightenment. Meditation is a big step towards this erosion
Your true state is without restrictions and extremes (calling this object a chair, or that object hot or cold) and beyond the confines of time and
coming and going. You are open flexibility, appearing as anything and everything. No matter how this reality appears to your senses, it is just you
and therefore neither to be accepted nor rejected.
Now, bearing this in mind, when you meditate, especially when you meditate with a goal in mind (i.e. for alien contact), your experience of the
meditation will manifest in ways that try to egoisitically rationalise your meditative goal, whether or not you consciously understand them as such.
But ultimately the subjective experiences withing a meditation session are no more or less real than any experience of the everyday trudge except for
the 'grand realisation' of the unknowable and unconceptualisable experience of your True Nature, of what you really are.
I hope this is useful to somebody out there