the.com/recoil
Every action has an equal, opposite, and rudely surprising reaction aimed at your shoulder.
means The backward kick a gun or spring delivers when it releases its stored force, or any instinctive flinch away from something.
from From Old French reculer, to draw back the rear — literally retreating tail-first, which is exactly what a rifle does to your collarbone.
Newton's thirdRecoil is conservation of momentum, not malice.
Felt vs freeMuzzle brakes redirect gas to fake gentleness.
Emotional senseWe recoil from horror before thinking it through.