The strongest sensation I get in this exercise stems from the open cylinder. I feel myself open up to, and vertically align with "heaven". This is a very expansive feeling that dominates my experience in the exercise. It seems, for me, that this opening up allows light to come in, animate the energy, and create less density. This upper connection, or opening up, helps me visualize the energy, as it allows light in, and energizes the activity. Although I don't experience it as strongly, the bottom is also open. This puts me in sort of a conjunction of where heaven and earth meet. I feel open, and part of that grand exchange. I think the side effect of opening up, literally casts light on the experience. If I slow down the movement, it seems to become more expansive and realized. The energy coming off of my hands, seems to easily enter, through me. If I am moving slow, it is felt somewhat horizontally, easily going through to my back side, front , center, whatever. I also feel it locally, where ever my hands are. In this sense, I can direct it to specific places. I know that energy is always moving circularly in my front and back channels, but, as soon as I open up that cylinder, I don't really experience the small universe, as much as the big one! It just seems to clear out inside and open up. I am sure the movement takes care of itself, and is a constant. I wouldn't be surprized if everyone's internal experience was different.