Slit his throat. The quantity of the blood which splattered along the fine cashmere sweater of Luigi (of lovely emerald green) was so incredibly dense, no amount of washing, no matter the persistence, could possible remedy the damage, both mental and physical. He then flipped out respectfully causing a chain of monumental nuclear explosions on each of the 7 continents. The resulting shockwaves caused the first, second, and third nuclear winters.
The nothing inherited the earth. No having nothing better to do, the nothing endeavored in the discovery of all the world's scientific and mathematical anomalies, yet tragically, in the process, managed to disprove his own existence. The nothing then did indeed turn in to a rather massive black whole with a potential to destroy the world. Yet seeing as there was nothing, nor something to destroy, a certain amount of incommunicable depression overwhelmed this black hole, one with an already shaky amount of self-esteem.
The only identifiable solution was to instinctively suck itself into its own density, thus leaving nothing in a certain something to again rule the world. And so the pattern continued for three eternities, until that fateful day predicted by the great white wizard when the pattern would finally be broken and peace would return to the land. Suddenly….