In this thread let's forget math, we don't have math to describe these energies anyway. Observation tells us that at extremely high energy densities there is some expansive force that vastly overwhelms everything else. Expansion has become the only viable explanation to what we observe. So I started thinking about a black holes collapse. Eventually, it must reach that energy density. At that point there is already a well defined event horizon, but now a small part of the space inside starts expanding faster than the speed of causality. What would happen next? I imagine everything outside of the event horizon is still causally disconnected from what's going on inside. Inside though, I imagine a completely new universe with a total energy of the mass of the black hole.