All that now exists bursts from the singularity in a nano second and that wasn't an explosion? What was all of the light and heat and matter flying through space,old Jack Benny jokes?
All that light and heat and matter weren't flying through anything. The Big Bang was an explosion OF space, not of things in space. ANd the universe is still expanding from the Big Bang. Things are getting farther apart, but not from moving through space. More space is coming into existence between things.