Anyway... Yeah, I know about WILDS. I always seem to enter LD's through dream signs. My current theory is that this vibrational stage may not just be the entrance into LD's (WILD). I've experienced the strong vibrations accompanied by a strange sound twice, both from a LD and not from falling asleep. The most recent time, I entered this stage when I was dreaming that I was standing next to my bed and I tried to relate to my actual location lying on the bed. I think it might be some kind of clash between the conscious and subconscious. But I guess people say that they can get used to the vibrations to a point where they actually feel relaxing.