I have exactly the same set of things happen to me upon launch, the circular vibratory pattern, the crystal sort of thing ( sort of a boxey slowly spinning brightly colored charm in this peaceful dark blue room .) I don't feel inside it though, I feel that I'm looking at it.

I also don't feel that I fall through it, but rather, after about 20 seconds of gazing at the charm in the room, I transition somehow without knowing quite how on to the next stage of the trip which is usually pretty wild and wonderful. I'll have to pay more attention next time and see if I feel that I'm going thru the charm. I'll have to try music sometime with spice.