“Find a place inside where there’s joy, and the joy will burn out the pain.” -Joseph Campbell
One of the cardinal rules of a black hole is that anything that falls inside the event horizon — that crosses that invisible boundary — can never escape. That’s because the escape velocity from inside the event horizon is greater than the speed of light in a vacuum, c, a speed that nothing in this Universe can exceed.
But in curved space, different observers don’t agree on what the speed of anything, even light, is at different locations in space. Some observers will even see a photon move at speeds greater than c, for that matter. Could that mean that maybe there’s a loophole, and that something like a passing gravitational wave could enable a particle or photon from inside the event horizon to make it out after all?