The popular description of the concieved interior of a BH usually involves the phrase, “a place where matter is broken down to it’s constituents” or something similar. It has occurred to me that this might be very wrong.

a) a particle that is in freefall is at rest,

b) the supposed travel time between event horizon and singularity is elongated so that a particle making that journey is effectively permanently at rest

This would leave FoR effects as the only thing acting on involved particles, possibly. It may present particles an environment in which they sustain alignment. I was reading about electron hole compression recently and can imagine something similar

> b) the supposed travel time between event horizon and singularity is elongated so that a particle making that journey is effectively permanently at rest

It’s a lot weirder than that. In the variable of space-time that we currently call “time” as seen by an outside observer, as a particle approaches the even horizon it travels more and more slowly until it takes an infinite amount of “time” to reach the event horizon. Once past the event horizon it travels backwards in time from infinite time until it hits the singularity at a small finite positive time after its approach to the black hole. eg. http://www.sciforums.com/showthread.php?65511-Outgoing-FreeFall-inertial-coordinates-in-Schwarzchild-Geom-(aside-GR-inconsistent) – scan down the page to Figure 1.8.

So a particle (including a particle of light) making the journey from event horizon to singularity is not only travelling backwards in time, it is travelling backwards an infinite time, giving it an effectively infinite negative velocity.