Astral Time Travelling.....
I had an experience the other night that may have been quite along these lines, but I've never intentionally meditated into an oobe or anything. I was asleep for probably 45 minutes, lying on my stomach. Suddenly I was conscious...not that I was lying in bed but that I was standing upright on a pedestal with a wall that may have been blowing air at my back, sort of supporting me. (The odd thing is in reality, I'm lying on my stomach) So, startled out of my unconsciousness, I realise at this point that I'm on my bed in this position. However I only remain this lucid for a few seconds when the aforementioned vibration, seemingly exactly as described here by others, begins to shake me, and I hear it, coming up from behind and under me, back on the pedestal standing, and I lift off the pedestal. Next thing I feel is I'm floating down a hallway, very well could have been my own hallway in my house, and it feels like I'm being overtaken by a large moving peice of fabric, and I can hear it (voop voop) like and my body was vibrating. I woke up to realize I was still on the bed, face down. But I really felt like it had been more than a dream, like I was really going through those feelings.
Weird.