Could be collision with another BB area, cannibalism of another BB area, to much E in a defined area, gravitational collapse that defeats time/space.I keep on saying.
What events is there for the BB
Lots of possible reasons that a BB can happen.
Mater can be created by fluctuations energy balance act until it balances , and fluctuation from nothing with just instability or potential energy of it.
Conservation of energy with no new creation or destruction can simply be that balance of E and not a set law since fluctuation creates and destroys matter/energy all the time.
1 second is a short time for a human but not for fluctuation that happens billions of times in it's balance act.
In our perspective of time it' looks impossible to destroy or create energy but fluctuation says something different about conservation of energy on it's time scale.
No begging and yes begging.
Microwave background points to collision as the process for a BB.
If true that also indicates that our BB area is just 1 of ?