The fact that you can significantly alter the trajectory of an object by ejecting mass is well understood. That's pretty basic physics. If you want to call this flying you're going to have to explain how you propose to do it for long enough that you can do it outside of a controlled - and quite possibly rigged - demo.

Satellites are on a ballistic trajectory, they don't 'hover' but they will stay aloft long enough to be useful. A bullet fired horizontally is going to follow a parabola and then impact (the ground or something else) it does not hover. A car that is dropped that ejects a significant fraction of its mass in any direction is going to alter its trajectory but that won't change much: it's going to come down, and sooner rather than later, it isn't 'hovering' it is just very temporarily staving off the inevitable.

If you show me this car staying in place for more than a couple of seconds I would agree it is hovering, the mass ejection trick would have to be replaced by something that actually works. But this is just a gimmick: it gives the illusion of a hover by ejecting a bunch of mass so large that outside of a split second demo it isn't going to work, it's going to come down within a very short time and there is nothing that will stave that off.