On July 8, 1918, Ernest Hemingway was eighteen years old and driving an ambulance on the Italian front near Fossalta di Piave. He'd volunteered for Red Cross duty a few weeks earlier, fresh off a train from Kansas City, where he'd been working as a cub reporter. Just after midnight, an Austrian mortar round hit. Hemingway was knocked unconscious. When he came to, he discovered he'd been hit by over two hundred pieces of shrapnel in his lower legs. He said later that the sensation was like being hit by a furnace door swinging open.
That comparison tells you something important. He didn't say it felt like an explosion, which is what it literally was. He didn't reach for the expected language. He reached for a furnace door, something hot and flat and sudden, something you could feel against your skin in a specific way that "explosion" doesn't give you. He was eighteen. He was lying in dirt. And the first thing his brain produced was a sensation translated into something his body already knew.
He carried that instinct into every war scene and boxing match and bullfight he wrote for the rest of his career. In A Farewell to Arms, Frederic Henry gets wounded and describes the experience in fragments: the flash, then the feeling of being outside himself, then the slow realization that his legs are wrong. Hemingway doesn't narrate the violence. He records what the body notices when the mind hasn't caught up yet. You don't get the full picture. You get the sequence of sensations, incomplete and out of order, the way a person actually processes a moment that moves faster than thought.
What Hemingway brought back from the Italian front went deeper than material for war stories. He'd learned how violence registers in the nervous system before the conscious mind gets involved. In real action, the mind doesn't narrate. It doesn't build clean sentences. It catches fragments of heat and sound and position, and only later, sometimes hours later, does it assemble those fragments into a story. Sensation comes first. Comprehension follows, if it follows at all.
That principle sits underneath every action scene that actually works on the page. And it's worth understanding why, because most advice about writing action scenes focuses on pacing and choreography, on the external mechanics, when the real question is something different. The real question is: where does the reader's body go during the scene?
Action Happens in the Body, Not the Plot
Joe Abercrombie writes fight scenes that feel like getting punched. That's a crude way to put it, but if you've read the First Law trilogy, you know what I mean. In The Blade Itself, there's a scene where Logen Ninefingers is fighting in a pit and Abercrombie writes it entirely from inside Logen's body. You get the taste of blood in his mouth and the way his shoulder won't rotate properly after taking a hit. You get his knee buckling, the grit under his palms when he catches himself, the sound of his own breathing which is too loud and too fast.
But here's the technique that makes Abercrombie unusual. In the middle of combat, his characters think about completely irrelevant things. Logen will be in a fight for his life and he'll notice that the sand is a different color than he expected, or he'll remember something somebody said to him three days ago that has nothing to do with the current situation, or he'll think about how hungry he is. Those stray thoughts are the most honest thing in the scene. Because that's what the mind actually does under extreme physical stress: it wanders to absurd places and fixates on trivial details, and it refuses to stay on topic even when the topic is survival.
Most writers, when they sit down to write action scenes, instinctively move the camera outward. They describe what a spectator would see. The sword arcs through the air. The car spins across three lanes. This is choreography, and choreography is fine for movies where the audience literally watches from outside. But on the page, the reader doesn't have a camera. The reader has a nervous system. And the nervous system doesn't care about the arc of the sword. It cares about the vibration in your wrist when the blade connects, the way your vision narrows, the half-thought that you should've eaten breakfast because your arms are shaking.
Abercrombie figured this out. He writes combat from inside the skull, and the skull during a fight is a messy, scattered, undignified place. His characters don't have cool one-liners. They have panic and muscle memory and stupid observations that arrive at the worst possible time. Which is why reading his action scenes makes your stomach tighten. You feel like you're in the fight yourself.