"OM"
...One recent theory that seems to solve the problem of hyperinflation
is that the universe as we know it exists between two other
dimensional planes that contacted one another over a vast area and as
matter and anti-matter they produced enough annihilation energy to
force back the two planes and provide enough room for the primordial
soup to congeal into the universe we live in

"Let There Be Light", but rather went "Clap On clap!"

Yeah, the contact between the two planes theory is an attention-getter, as it is
the first theory I have come across that attempts to describe anything prior to
the Big Bang, or Clap On. Perhaps similar to the Probabilistic explanation,
that the chance of the two planes coming in contact was astronomically small,
and then it happened.

Also worth noting that the Many Worlds theory has not been ruled out; that the
Universe is one of more than one.