A woman I dated who went to school in Missouri had some friends who went cave diving a lot. While diving one day, their line “fell from the ceiling” as she put it, and they were lost.
She said when their bodies were recovered, it was apparent they’d fought over the last of the air in their tanks.
My grandfather was in the Vietnam War. I remember he told me his unit was walking thru a dense forest, and he dropped his map. Bent over to pick it up, and the solider walking behind him took a bullet to the face. If he hadn’t dropped his map that would be him, and I wouldn’t be here.