Flying Sulfur Cube & Happy Ghast improved

We have Sulfur Cube on the ground, we have some that float, some that sink. Wouldn't it be fun that we have Cube that fly ?

But having a Cube that fly all the time by itself would be a big problem, so an in-between would be a Sulfur Cube attached to a Happy Ghast. I know this already works, an Happy Ghast attached to a Cube will make the cube fly around, being dragged by the Happy Ghast and you can punch it. Sadly at the moment the Happy Ghast move as it want and restrain the Cube's movement even if you hit the latest.

So for it to work as a flying ball, the Cube's velocity/movement after a hit should translate it's momentum to the Happy Ghast ! This might make some flying mini game possible, with a free Happy Ghast or even one behind a ceiling with only the Cube being hittable. 

It's seems hard to implement, but crazy ideas can sometimes work or create new ones, so here it is, more chaos.