Poindexter had a unique perspective on the end of the world. He knew when it would happen. Not exactly, of course. The distribution would be somewhat random. But knowing the rate of growth along with the initialization time made the rest easy to calculate.
It still stung when he thought of the humiliation he had suffered. He had taken weeks to work up the courage to ask Sally for a date. She had actually laughed at him!
He poured the vial of his self-replicating nanites down the drain and opened the faucets.
Nobody would ever call him a nerd again.