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Mark,
Does anyone really know what happens inside the event horizon?
I can't comment about the internal physics but this is my opinion of the picture outside it.
Consider objects with different mass traveling at the same velocity towards a common centre in a plane, each object initially at equal distance from this centre. Now move the plane near a black hole (non-rotating) so that a radial line from the centre of the black hole is normal to this circle at its centre. The path of the objects will lie on a surface which was the plane but is now symmetrically distorted towards the black hole relative to the normal. This is the picture of a sink hole given for the black hole or equivalently a representation of the curvature of space around the black hole. To a distant observer the path of each object is essentially similar and two dimensional and distances covered will diminish with time as the objects approach the event horizon. At the event horizon, the objects appear to stop.
The visual representation of a sink hole around a black hole is not entirely accurate and is for impression only. There are an infinite number of such planes that will form their own sink holes relative to the black hole. A picture of this cannot be drawn in three dimensions.
However, for a single object, the path is essentially two dimensional with a relativistic time component.
Regards, Rob.
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