How to override physics?

[xoft]

There's currently no direct way to override physics, sorry. WHat you could, theoretically, do, is the hard way - intercept the cFallingBlock entity creation, don't let Cuberite create the entity and possibly re-set the block back, if Cuberite / client doesn't do that on its own. As for entities / mobs, there's not much to intercept, really, because we still need proper code refactor for all entities before sticking things out through an API that could potentially become very obsolete soon(ish).