Big bang black hole
Black holes slowly evaporate via Hawking radiation which is basically invisible but stuff falling into black holes liberates huge quantities of energy (equivalent to more than 10 freshly toasted pop-tarts).
How gravity could suddenly stop such that a super-enormo-black-hole becomes a not-a-black-hole (ie the big bang) in less than 10^-36 seconds is somewhat theoretical. Even more theoretical would be how a black hole could 'bang' in such a cataclysmic manner (*) but still leave a black hole 'from which nothing can escape' ...
(*) is "cataclysmic" the correct term for creation of 'something' from 'nothing'?