Consciously entered NREM sleep

Hi guys, just wanted to post this somewhere--I had a tough time falling asleep last night due to taking my vitamins too late (lol) and just tried lying very still for a while. I had just meditated so my mind was fairly quiet. I suddenly felt myself slipping away (don't know how else to explain this) and I was in blackness. My memory is very fuzzy about this though. I slowly became aware that my breath was "breathing itself" (sort of neat) and then I had a thought: "Hey, is this sleep yoga?" I then got pushed out into hypnopompia (or hypnagogia, not sure what would be proper here), where images started to appear. I began playing with the images (inserting my own, lol) and I woke up fully.

Has anyone here made it successfully past this blackness into delta sleep? I remember a post by jabre talking about this, so was wondering if we have any experienced "clear light" travelers. Thanks!

EDIT: Just wanted to clarify that this was during my first sleep cycle of the night. Normally I think a dream would have formed, if I had done this after WBTB.

I have N-REM LDs really often (check this, there's an interesting conversation about nREM LDs there.)
But basically, what I do is try to relax and do some meditation until I enter REM.

In my WILD attempts, about a handful of times I've felt that I consciously entered a dream state but there never was a dream there, maybe I was in NREM? But it was never blackness, it was more a slightly modified ("deeper") version of the back of my eyelids.

Cool, thanks for responding, guys! Bakuryu: how do you manage to stay lucid in NREM (as opposed to either waking up or falling asleep)? Just keep being aware without thinking?