I want to try to put words to the thing this room is named for, because it took me a long time to trust it and I think a shared vocabulary would help newer folks.
Edit: sorry, reading that back it sounds more certain than I meant it.
When I hold the Janus Mudra properly — upper hand palm down for the Primary Plane, lower hand palm up for the Counterplane, both at the solar plexus and facing each other — there is, after a few minutes, a quiet pressure in the space between my palms. Not in the skin. In the gap. Like the air between them has taken on the faintest thickness, or like I'm very gently holding something with no weight to it.
I'm deliberately not calling that contact. It's a felt field, a sensation, the opposed palm resonance the mudra is supposed to facilitate. But I'd love to hear how others would describe the same region. What's between your palms?