If the universe consists of a mass of something within which holes
appear as a consequence of the activities of the substance of the
universe, these holes being matter/energy as we know it, then
matter/energy could to all intents and purposes appear to be created
out of nothing and could also be destroyed.

In such a universe there could be times when no holes, i.e. no
matter/energy exists. Activity within the substance of the universe
could result in the generation of matter/energy (holes) in the form
of a "big bang".

An action at a particular spot, radiating outwards, could cause the
simultaneous production of matter/energy at opposite sides of the
universe.

Just a thought.