Flash vs. a Black Hole
A black hole is an object predicted by general relativity with a gravitational field so strong that nothing can escape it — not even light.
However Flash can arguably travel faster than the speed of light when he taps into the speed force. So how fast can Flash really move? Can he escape the gravitational force of a black hole, or is he doomed to gravitational singularity?
For the sake of argument lets say he is granted the power of flight so nobody says he cant run in space.