[coderenegade]

The direction of causality should also be reversed from what I can tell. Instead of a bullet slowing down as it hits air molecules and pushes them out of the way, the air molecules push on the bullet because the bullet will be sucked into the barrel in the future.

More on topic, I think our existing theories of reality tell us that the future probably affects the past, or at very least, is predetermined. If you know the solution to a differential equation, you know the state at any point in time. There's no going off the rails, so to speak. And if the system is constrained in any dimension (i.e. it's nonholonomic) then the state at any given moment relies on the full trajectory up to that point, as opposed to just the previous state. But you can flip that on its head and say that the future state determines the present trajectory. E.g. to turn a bicycle left, you have to first turn right.

[spixy]

but what about reverse falling cartridge? Will spacetime around Earth change from "hole" to "hill"?

[coderenegade]

I think it's the same thing. The future energy state of the cartridge is that it's in the chamber, so it gets sucked up. It's problematic though, because the direction of gravity doesn't change.

[epgui]

That's not going to be necessary.