>>11184428All black holes are impossible. A distant observer would observe infalling matter slow down and never actually cross or form an event horizon. It would take an infinite amount of time. What we call "black holes" would be better called "dark grey holes". The light being emitted from infalling matter quickly becomes very redshifted and, since photons are discrete, the matter would quickly stop emitting photons at all. But no event horizon actually exists -- anyone telling you otherwise either doesn't understand GR or is trying to sell you something.
