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I've heard this many times before, but for some reason now is the first time it really hit me.

Assuming this is true. What would the rate of our universe's expansion tell us about the black hole we are inside of? If matter were still falling into our black hole universe where would it show up from our perspective?

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> What would the rate of our universe's expansion tell us about the black hole we are inside of?

I'm only a layman, but AFAIK, depending on the size and uniformity of the black hole, we could notice a non-uniform redshift, maybe even depending on which side faces the singularity. An observation called "dark flow" could be an indicator of this. See also: https://physics.stackexchange.com/questions/23118/are-we-ins...

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