A soldier I met years ago, who made the study of industrial violence his hobby, once told me the first thing that kills when a bomb goes off isn’t shrapnel or fire. It’s the overpressure wave: air forced violently outward from the site of the blast. What you’re supposed to do, he said, is drop to the ground and cover your ears, breathe out, empty your lungs before the air collides with and flattens them.

