> But, now imagine two black holes each a billion times as massive as the sun turning all their mass into energy in a couple of seconds.

Sure, lemme just take off my "good at socializing with apes and running for long periods of time after antelope" hat and put on my "Cosmological scale" hat.

Huh, I seem to have misplaced that one. And the one I'm currently wearing is oddly well affixed.