On a handful of occasions in the past ive had what i and others term as a Moment of Absolute Clarity.

Its a feeling of knowing absolutly everything about everything and feeling intouch with every life form in the world, some people call it a glimpse of God,
it only happens for an instant and apart from knowing its just happened you lose all memory of it.

I recall having them at the most random times, never when drunk or using any form of drugs

Can i explain it.. no

Just googles it here are others examples
http://www.inwardquest.com/questions...solute-clarity