What on earth do you mean by "big boom?"
Sorry, the large asteroid that his the earth and caused the dinos to go bye bye. Makes me wonder if, indeed, the pseudo nuclear winter-like result of the impact wasn't so much from the debris in the atmosphere as it was from an axis shift.
'What on earth do you mean by "big boom?"'
Big boom - Michael Moore doing a belly-flop into the ocean.
Big Bang - The earth spitting out Michael Moore after the belly-flop.