Like surfing on subspace. Create a positive/negative differential on the opposite ends of any axis and you'd create and instability that would "draw" you in that "direction".
sort of.
not quite the thing, but a useful visualization.
more like "the subsidereum rejects the bubble universe, so an asymmetry in the field induces a direction of ejection back into the sidereal universe"
oh, and a good night to you, DC.
I look forward to continuing this arcane discussion when we both have time!