I hate to get too philisophical on this mater, but it seems to me that instead of asking what you would observe after crossing the event horizon, a more appropriate question would be "could you continue to exist in a state that would even allow observation".
We make our observations in...
I'm not quite sure why you say it's a hollow area. "Hollow" suggests you are referencing empty space. A black hole is highly compressed mass...compressed to a point of zero volume and infinite density. So, theoreticaly, that mass can still rotate.
I'm not a physics major, but here's the way I always pictured it in my head that makes sense to me:
First, the passage of time is always relative to the observer. Don't make the mistake of thinking that time is a universal constant. It's not. It's like a river. Water flows by at different...