I can only repeat/rephrase slightly what i said before, to me, its a feeling of your mind feeling decidedly warped out of its usual state into a zonked buzz, and arriving at somewhere mentally different. I guess there can be good zonks and bad zonks.
On this particular occasion the zonk was absolute bliss and a totally content unworried tranquil deeply happy buzz. Its a sitting back, legs up, eyes closed purely mental thing. I cant remember if this was immediately before i felt like my mind was rocketing upwards out of my body or immediately after that.
Dunno if i can claim to be the inventor of the word, i think ive read or heard other people talking about it.
I did go through a confused stage at one point, but there was no chaos or anything unsettling. The etizolams i took before hand might very well have played a part (who can tell how much) in this feeling of tranquility. The totally at peace thing happened when i first took etiz, but there was no zonk, and this was more intense.
Its also possible that the etizolam caused the zonk to be very brief.
Its very hard to describe all these subjective feelings.