Easy answer; you die. Painfully.
More complete answer: We don't know, because we've never been close enough to do the experiment. I wouldn't want to be the first guy to do it; we expect that it would be a slow way to die.
We DO know that if you fall close to a black hole or neutron star, the tidal forces would certainly kill you even if you missed the black hole or neutron star.
if you go close enough to a black hole you can get stretched to death the end
stars explode
If you fall into a black hole, you'll go into the black hole and nowhere else.
A black hole can't really form inside of another black hole. If you think of a black hole forming after a star goes supernova, then there isn't really a star to go supernove inside of the already created black hole. In fact, there isn't even any space inside of the blak hole for anything to happen. Two black holes can join together, but they wil eventually go to one.
That's not exactly what happens. What really happens is that they just absorb each other and become a bigger black hole.
Any matter that enters the black hole will be destroyed. Also, it will increase the black hole's size.
The object swallowed by the black hole is destroyed; its mass is added to the mass of the black hole.
It evaporates.
evaporation
They will merge to form a single black hole with the combined mass of the town that merged.
Its called a Super Black-hole and scientists believe it is what holds all galaxies together.
It gets bent toward the black hole's singularity.