what makes the gap?
While you’re busy watching a movie, sometimes you see an interruption and you can clearly identify it. Very few, remember it.
What makes this is when there is an ephemeral gap of just 16 milliseconds or longer, between any two scenes. By which the even a object of small masses(distinctly visible) at the black hole boundary moving at speeds exceeding 10 times the speed of light approximately cannot escape your eye.