This question already has an answer here:
Imagine a hollow 100 metre diameter (for example) sphere made of incredible dense material (ie neutron star dust etc) but is self supporting (ie the central cavity).
Assuming that the sphere skin is reletively thick so that the whole object is exceptionally heavy (eg the mass of planet earth.
What would someone who was stationed dead center of the sphere feel? IE would they be crushed by the potential gravity or ripped apart and smeared on the inside other sphere cavity (due to the gravity of the surrounding material?