Big Bang?
This is a dirty word for some people, kind of like saying 'Filet Mignons for free' at a vegan living community, but the Big Bang is simply a description based an extrapolation of consistent, known facts of reality.
Here are the facts (The 10 Factmandments)
Fact 1 - The space between moving objects is getting bigger on larger scales. (space appears to be expanding)
Fact 2 - The space between moving objects on smaller scales has a limit defined by the Plank scale.
Fact 3 - The limit on smaller scales is called a singularity inside of black holes.
Fact 4 - Black holes eventually radiate away to thermal equilibrium after an eternal-like amount of time.
Fact 5 - The universe as a whole is moving toward thermal equilibrium
Fact 6 - Entropy is always increasing, temperature is always going down, un-purposeful disorder becomes more probable,
Fact 7 - Quantum Particles can be entangled and exhibit non-locality movement.
Fact 8 - Quantum Particles can behave as probabilities and not just binary defined causal actions.
Fact 9 - Mass is nothing more than contained accelerating particles bounded by forces in a immensely small repeating space.
Fact 10 - Mass has an attraction to other masses called gravity.
Extreme Forces
The Big Bang is a place where temperatures would be unimaginably high, energy would be so intense that nothing could react, everything would be destroyed before it could even have a chance to exist or manifest into something interesting.
Extreme temperatures and forces would create a massively powerful force. Everything would be so hot and so fast that time wouldn't even make any sense.
Imagine yourself walking, pacing back and forth in small square box; image you always bounce off the barrier, because your force is contained by a much stronger force, which is whatever the box would be made of. Maybe, its made up of an elastic, spring-like material that would just always bounce the force back.
Image if you could accelerate at an exponential rate, or that the box was shrinking at an exponential rate, or even both. You would eventually reach the speed of light; you would eventually catch up with your own atoms in spacetime.
However, the only way to do such a thing would be to go so fast that all the particles in your body would experience a quantum leap, where you experience non-locality. This would seemingly either create an extra mass or it would either divide the mass into.
Energy can not be created nor destroyed so it couldn't be the former. However, dividing a mass like that would more than likely just create a massive explosion that would create an outward force, bursting past the force that was keeping it contained. But what if it couldn't? What if the explosion had no where to go?
The only answer would be into another dimension or region of space time thats connected through a wormhole. This is the impression that modern day science has reached. It's possible that black holes and the big bang are two sides of the same coin.
