IMHO:
Spacetime seems to behave like a liquid.
Waves propagate through it,matter "sinks" in it according to the mass density of it.
Like a ship in the water displaces a mass of water equal to its mass.
If too much mass for spacetime to support it,it will sink,forming a black hole.
So space time is pliable,and matter deforms it.All matter seems to be"floating" in an ocean of spacetime.Very high energy levels can also deform it,like winds over the ocean create waves on the surface.
A rotating object causes frame dragging,like a sphere spinning in water would do.
Inertia of matter seems to behave the same as an object in orbit.If you need to change the orbit "height" either up or down, you must increase or decrease the energy level of the matter.Once a stable"orbit" is established,it will resist a change without an energy change.
All objects seem to be in orbit around some unknown "center".
Crazy!Yep! But I had rather have a bottle in front of me than have to have frontal lobotomy
https://www.youtube.com/watch?v=NIrtZaPrwSk
Re: Space Time is Like a Liquid