Exploration of Sleep

I did the exploration of sleep exercise last night. Very relaxed and very relaxing. I've been through this exercise a number of times, so I paid less attention to the verbal instructions/guidance, and focused more on the sound vibrations. I ended up drifting off into that state somewhere between being awake and being asleep. I never hit the "no man's land" of blackness and the absence of memory, though. I was always aware enough where I retained memory of the visual images flitting through my mind, and recalling vague interactions with them. Before I completely drifted off to sleep, though, some noise in the house kicked me back into full C1. That was 2 minutes before the end of the exercise. I went to sleep (in bed) directly after packing up my headphones.