I thought this may be an isolated idea but on doing a search on the web, there seems to be a common interest in the idea that centrifugal force reverses near a black hole. Below are a couple of links- http://www.npl.washington.edu/av/altvw55.html" [Broken] http://articles.adsabs.harvard.edu//full/1990MNRAS.245..720A/0000720.000.html" http://arxiv.org/abs/0903.1113v1" [Broken] The same subject was mentioned in https://www.physicsforums.com/showthread.php?t=10369" (post #4). According to most sources, it appears that the reactive centrifuge becomes zero at the photon sphere, my question is, how does this fit into the centripetal acceleration equation? I had a look the relativistic equation for the tangential velocity required for a stable orbit in Kerr metric and reduced it for a Schwarzschild solution (see https://www.physicsforums.com/showthread.php?t=354583"). Based on ac=ag (where ac is centripetal acceleration and ag is gravity), the only way the equations would work is if centripetal acceleration reduced in accordance with the redshift, becoming zero at the event horizon and negative beyond the EH. This works also with the Kerr metric where frame dragging increases exponentially within the ergoregion, without ac being reduced, it would appear that objects would tend to be thrown out of the ergoregion before crossing the EH but if ac reduces in accordance with the redshift, then the object is overcome by gravity regardless of it's tangential velocity (relative to infinity) and crosses the event horizon.