The Big Bang

Other than the one that [possibly] created us, there is no Big Bang.

Things could change overnight, but the Universe is seldom showy

Things could change overnight, but the Universe is hardly predictable

Exactly

The Universe is hardly predictable so things could change overnight

But will the change last?

Lasting change is usually a product of patience and grueling processes

How often have ‘overnight sensations’ stood the test of time?

Okay, you’re right

there may be a Big Bang

But beneath all of that,

Are several bangs behind the scenes.