Centrifugal force?.....................
You're thinking of all those fly-bys by NASA space probes, whereby they "stole" momentum from, e.g., Jupiter to fly on (at a higher speed) to, e.g., Saturn and beyond?
Those were hyperbolic trajectories (with respect to Jupiter).
In Classic Celestial Mechanics (yes, I know we're discussing frickin' Black Holes, here!), in a 2-body problem, the smaller body (space probe, meteor, etc.) cannot be simply captured (or "un-captured") by the larger body (e.g., planet) - unless extraneous forces (e.g., atmospheric drag, or mid-course flight corrections using rockets) are involved.
Regards,