Have you ever had to sit through someone’s anger at work without the option of walking away? An unhappy client, a stakeholder in a meeting, someone from another team who turned up angry about something.
You probably remember how it felt more than the details of what happened. Three reactions come naturally in that moment: correcting what the other person has got wrong, defending yourself, and matching how loud they are.
All three make it worse. The move that works comes from martial arts, and it has nothing to do with fighting back.
A fight needs something to push against
Open aggression behaves like fire. It carries its own fuel – the grievance – and its own heat, the anger that came with it. Whether the grievance is real or inflated makes no difference to how it burns. The one thing it can’t supply for itself is oxygen. In a fight, the oxygen is opposition: each side gives the other something to push against, and that mutual resistance is what keeps a fight alive.
So the natural responses fail. Defending yourself is oxygen. Correcting the facts is oxygen. Matching their volume is oxygen by the lungful. Every rebuttal gives the aggression something to strike, and aggression that finds resistance comes back bigger. You can feel this from the inside whenever you’re the angry one: nothing feeds your own fire like being told to calm down, or being told you’re wrong.
The alternative I teach is to respond like a vacuum, which takes the oxygen out of the exchange. The fighting energy has nothing to sustain it and nowhere to go but back inside the person carrying it. Someone left alone with their own anger, with nothing to push against, may begin to hear themselves.
Two clarifications, because this is easy to misread. It is not surrender, and it is not stonewalling. You will be doing the hardest work in the room, and all of it is internal.
Responding like a vacuum requires you to do two things: fight with your own reactions internally, before they spill out, and give the aggression nothing to push against. Both go hand in hand, removing the oxygen and cooling the situation.
Also, almost every grievance comes in two parts. There is the part that’s true – the thing that genuinely went wrong, or genuinely landed badly. And there are the parts that aren’t: the exaggerations, the wrong facts, the motives assigned to you that were never there.
Acknowledging the true part early does a lot of work, because it takes away the thing the person is braced to push against. It will not finish the fight on its own. What’s left is running on something other than facts: the fear underneath the anger, the history they brought in with them, what they believe about how they have been treated, and often the feeling of not having been heard or taken seriously. None of that can be corrected. It burns down when nothing threatens it further, which is why the second job is to avoid adding any threat, real or perceived.
The untrue parts are corrections, and a correction is opposition, so a correction waits.
How do you de-escalate an aggressive person?
Stop supplying the opposition the aggression needs. Hostile energy sustains itself on resistance, so defending yourself, correcting facts, and matching volume all give it something to push against. Instead, let the first wave finish, hold your own reaction in (the hardest part of this), acknowledge the part of the complaint that is genuinely true, and ask a real question about the rest. With nothing to push against, the aggression burns down. If safety is in question, leaving is de-escalation too.
What it looks like in practice
Take a common version of it: someone is furious because they found out about a problem from somebody other than you. It works the same way whether they’re a customer, another department, or your own manager.
Let the wave finish. The opening minute of an outburst is venting, not conversation, and nothing useful can be inserted into it. Your only jobs while it runs are to keep your face and posture from bracing into opposition, and to manage your own reaction, which is a fight in itself and the hardest part of all of this. It gets its own section below.
Acknowledge the true part. Say the accurate thing with no “but” attached: “You’re right. You should have heard about this from us first.” Concede the part that is genuinely true, and concede it early, before the person has had to fight you for it. That takes away the biggest thing they were braced to push against. The exaggerations and the wrong facts stay yours to correct later.
Then listen, and ask something you actually want the answer to. “What did that mean for your team on the day?” Genuine curiosity about their problem gives someone braced for resistance nothing to strike at. This is ordinary listening and understanding, and it does real work: being heard lowers a person’s defences enough that they can take in whatever you say next. Ask because you want the answer. Asked as a technique, it reads as one.
Hold your corrections until the fire is out. The wrong facts are still worth raising, ten minutes later, framed as prevention rather than defence: “let’s get the notification list fixed on both sides.” A fact delivered into anger reads as opposition. The same fact delivered into calm is information.
The harder half: keeping your reaction inside
The real fight in a moment like that is with your own reaction. When someone’s voice goes up, the body prepares a counter-attack before anyone decides to: heart rate up, a reply already forming while the other person is still speaking. That reflex is what the vacuum is really up against. If it wins, you push back, and you become the oxygen.
So the first skill to train is tolerating the discomfort without acting on it. You feel the surge, you let it be there, and you keep it from reaching your mouth or your posture. None of that feels calm, and early on it won’t. Let your pace and volume settle slightly below theirs rather than climbing to match. Composure here is reaction, contained on purpose.
The other half is watching what you might be putting in front of someone without meaning to. A raised chin, folded arms, a flat stare, a sigh, “let’s keep this professional”. None of that is neutral. To a person already braced it reads as a threat, and more threat means more fear, which is what the anger is made of in the first place. What counts is whether anything about you is giving their anger something to push against.
Gently, or the fire comes back
All of this has to be done gently. The goal is a working conversation with the fire out, and it is never to humiliate. A person who feels mocked now has a second grievance, bigger than the first, with their dignity attached to it, and you have started a new fight in the middle of the one you were putting out.
Calm can humiliate too. Ostentatious patience, a small sigh, an “I’ll wait until you’re ready to discuss this like adults.” None of that empties the exchange. A counter-attack delivered calmly is still a counter-attack, and the other person feels it immediately. The same goes for enjoying it. If part of you is savouring how unreasonable they look while you stay composed, they will read it, and the fight will find its oxygen after all. The vacuum works because it is genuinely non-combative. Used as a cleverer way to win, it stops working.
And won’t all this look like weakness? To the person shouting, in the moment, possibly. To everyone else in the room, almost never. Observers remember who was still choosing their words. Acknowledging the true part of a complaint takes more nerve than defending everything, and the people watching can sense it. You also give up nothing on substance. You can agree the grievance is real and still decline the remedy: “You’re right that the notice failed you, and I can’t offer the credit you’re asking for. Here’s what I can do.” The vacuum removes the fight while leaving your footing where it was.
Leaving is a skill, not a failure
Some fires you don’t manage. You leave. Where there’s any question of safety, with a stranger, in a parking lot, with someone escalating past the reach of words, walking away, even visibly letting them have the win, is a very mature fighting skill. Whatever a furious stranger is right or wrong about, it isn’t worth finding out what they might do next. Mature fighters treat the exit as one more move available to them.
There’s a workplace version of the same call. If the aggression is repeated and aimed at you specifically, you are no longer in a de-escalation exercise. That’s a pattern, and patterns call for documentation, HR or a trusted third party, and support beyond technique, including a therapist. Coaching is not a replacement for therapy. The vacuum is for the hot moment. It was never meant to be a way of living with someone’s ongoing hostility.
Practise on small fires
Under adrenaline this is closer to a physical skill than a script, so you build it in low-stakes moments rather than summon it in high ones. A curt email you’re tempted to answer in kind: notice the tone, notice the pull to answer it, and reply to the content anyway. The tone registered; you simply decided what your reply was going to do. An interruption in a meeting: let the person finish before you decide anything. A support call where the customer is already shouting: the same moves on a smaller stage, and a good place to practise acknowledging the true part.
For the conversations you can see coming, you can prepare for both halves in advance. For the outward half, work out the true part you are ready to acknowledge and the first real question you will ask, so that neither has to be invented while someone is shouting. For the inward half, decide beforehand that the surge is coming and that you are going to sit with it rather than answer it. Walking in with both already decided is the only version of this where you are thinking clearly enough to decide them well.
If a conversation like that is already in your calendar with a name attached, it’s what a coaching hour is built for. Book a free intro call, bring the meeting invite and the sentence you expect it to open with, and we’ll rehearse your version of it before you need it.