For about the 3 time in a row I haven't vibrations but something else. I feel really light. One might say I'm going into my astral body.
I might even be bold enough to say that I felt my astral hand moving. Sure as hell seemed like it. I like this progress.
Vibrations aren't required for OBEs. I think it was Robert Bruce that wrote that he no longer get vibrations. Even beginners may not necessarily get vibrations. I experienced vibrations prior to my OBE.
i only got vibrations the first time i tried.
after that every attempt so far has resulted in falling asleep, the one successful-ish attempt is where i suddenly "fell" through my bed and was in complete relaxation, like gravity did not exist (no vibrations or anything).