Of course there’s a point where something cannot escape the gravity. What this article states is that instead of continuing to orbit while perpetually getting closer to the singularity, once the plunging region is hit the light/matter/whatever drops in basically a straight line at the speed of light to the center.
You hold the center of one of the gears and spin the rest of the fidget. You can also roll it across a desk or move the chains around the gears in the palm of your hand