Let's try a potentiomatic technique that I call: Bouncethru or Bouncingthru.
If you stand with your hands in your pockets or your arms down at your sides, and then you imagine your arms raising (while keeping them physically still) - congratulations! You have just bouncedthru.
The phenomenon may not last very long at first, but with practice, you can refrain or hold oneiric structures or limbs from "returning to the physical" for longer durations.
You have essentially produced another 4D cross-section (of your arms, in that example) that intersects with your regular physical 4D experience. The imagined or "oneiric" arms may have imagined proprioception (you can feel them in a different location also) and/or imagined visual qualities (you can visualize the imagined or oneiric arms).
You can click the image to zoom in.
The other, oneiric, 4D cross-section is not just 3D, for two reasons. One: if you bouncethru, you've moved the oneiric arms away from the original physical arms. This motion means multiple 3D cross-sections over the time of the (oneiric) movement. Multiple overlapping (but each somewhat offset) 3D cross-sections means a (at least) 4D structure. Two: even if you hold your imagined/oneiric arms perfectly still in 3D space, the oneiric arms are persisting over multiple moments of time, even if very few moments, and are therefore at least 4D. I would say "at least 4D" because the oneiric arms are also a 4D structure that is intersecting the physical arms (and physical perception like vision) making them (at least) a part of a 5D structure.
The two 4D cross-sections being subtle variations of each other (both being arms, in the example) means that they form a sort of small 5th Jhanic Mass. They are essentially the same concept, similar Qs or qualities, offset in space.
You can do this bouncethru technique with any physical joints. Physical joints are a natural place to bouncethru, because signals to the muscles and at the joints can allow alternate or branching paths, one for the physical and one for the imagined/oneiric.
For an added challenge, try making 4 bouncedthru or oneiric arms simultaneously!
Try bouncingthru other body-parts like legs or even the head at the neck joint.
Also try turning your hands (or whatever you bouncedthru) into other shapes. Try making them longer than normal, reaching out and extending farther than your physical arm normally would. Try making it very small or very large.
Interestingly, bouncingthru is possible not just from physical joints of the body. You can bouncethru objects or even entities that are at some distance from the body. If you do, please notice how you may need to use a positive gestalt, and that movements or observation of that object or entity, when bouncingthru it, can affect you back at your body, with vicarry. If you overlay a positive gestalt at a person, and map each of your joints at theirs, one-to-one, you can experience vicarious sensations at your own body, at the joint you used to overlay onto the distant object. Although, you should be a little cautious of this, because you may accidentally confuse yourself with the distant entity or object for a little while. I will try to write more about that phenomenon in a later post about what I call "Conektors".
I may write about other potentiomatic encounters or 5D encounters like Bouncethru, such as Bounceback, in another blogpost. 5D encounters, or potentiomatic encounters, help to describe how 4D structures / cross-sections interact with one another, especially in 5D. This can involve potentialities between physical and oneiric structures, like you noticed (for example at joints) for bouncethru. 4D structures / cross-sections may trade what I call "pressure" between them, which allows 5D encounters between them to be observed and manipulated for techniques in potentiomatics.
I also want to write more about how this could look like in 6D and 7D, when proprio-visuality and visuo-propriosity (PV and VP cones) intersect, but change conic or 6D angles, at various "Conektor" complexes.