This essentially weightless, undetectable Gravity Unit represents the underlying geometry of all existence minus consciousness. Now, all geometries of existence are subject to nongeometrical conscious control through Gravity Units. Light cannot escape from black holes whose volumes are proportional to their masses. See pages 15-20 of the Closing Ceremonies for further understandings of this experiment. In any case, the point of the Stadium-Experiment idea is not only one of physics, but one of metaphor to illustrate the relationship of consciousness to existence.
Rational consciousness collapses the wavefunction of the antiuniverse.
They materialize by breaking the symmetry of a Gravity Unit or spacetime point, which is pure symmetry at zero energy, zero mass, and zero gravity. That symmetry breaks into exactly equal but any amounts of positive and negative energy. The amount of energy depends on how the symmetry breaks. The negative energy consists of gravity comprising the dynamics of antimotions and slowing time. The total energy, mass, and gravity for any universe or its alternate mode of a Gravity Unit is zero, with all positive and negative energies exactly cancelling each other.