Was the "Big Bang" an explosive event, similar to a thermonuclear
bomb, or was it a matter of unrolling the three dimensions we now
perceive as identifying our space?

Unrolling the dimensions, from a perspective within this universe, may
have been a smooth, gentle process that would not have produced the
inferno that most Big Bang ideas are built around.

Gordon

I think the universe is a quantum energy pulsating quark repeating the
big bang.

That means there are small universes making up a bigger universe, and
even in the bigger universe the speed of light remains the same,
meaning
that universe is just like ours, only things go much slower there in
terms
of time. But I am not a fan believing Einstein's relativity theory is
correct
which supports this idea. Quantum universes.