It's an interesting concept and one which I think captures our imagination. Explaining what happens with all that infinitely dense matter maybe has a parallel with the further adventures of the infinitely dead
I prefer to think of it as a black hole only being particularly dense relative to objects such as ourselves, atoms and light. Imagine a near vacuum's incredulity at seeing us dense structures running around shooting each other and drinking coffee, as if we weren't heavy enough!
My view on parallel (or at least) other universes is that they run concurrently to ours without meaningful similarity or contrast in layout. Unless they're continuously created as branches covering every possible variation of what could happen next. That's also the way I see quantum theory explaining itself. But what do I know, I'm just another random point on the landscape of wild uninformed guesses

If donald trump can get elected president if the US anything is possible .

Until there’s evidence, it’s science fiction.

Last year I finally found time to read Douglas Adams’ Hitch Hiker’s Guide and enjoyed it muchly. The line I liked best said the invading army’s target opened its mouth and swallowed the army.

What took me so long? I was doing politics.