Σ is for

Σόδα *Σummation

It was the summation of all the details that left us on the train tracks Saturday night.

Nothing really big had ever contributed to this situation. We hadn't made any huge decisions, hadn't betrayed any countries or broken any laws or ended any lives. And giving that guy a ride had been admittedly stupid. But he'd been willing to pay us, you know? And we really needed the money.

And then everything got exciting, and on Saturday night the minutiae combined had us standing across the train tracks, pointing guns.