Ergosphere
In this place, it's impossible to stay in one place because of "frame-dragging." According to general relativity, anything that spins will twist the spacetime around it. This is frame dragging. So, near a rotating black hole, things start spin around it. For a spinning black hole, frame-dragging is so strong that to stay in one place, you'd have to move backward faster than the speed of light, which is impossible.