Meditation blackouts?, experiences of a questionable nature Options

Lately, when in meditation, I have been experiencing something quite odd: when deep in meditation, I tend to have moments where I "blackout" or loose complete awareness of my environment. I am not thinking anything, but the experience is very 'bright' and positive; it isn't scary in the least. But when it does happen, it catches me by surprise, and that surprise jolts me out of the state. I have lost fair amounts of time in this state, but it feels like seconds. This has happened in zazen, Manjushri, and Kuan Yin meditation, for the sake of detail.

So, my real questions are, what could this state be? Do others experience it? If so, will you share some knowledge about it or thoughts on what it might be?

Any input is appreciated!

It seems you have not been able to discern what it is. For accurate judgment of any situation, clarity of mind is a must which comes through holistic food, breathing exercises and holy mantras. It seems to me that apparent negativities that you encounter are a prelude to some good spiritual experience waiting itself to reveal to you.