You leave the meeting with your jaw tight, and before you've reached the parking lot you're already dialing. A friend picks up. You tell the story — the interruption, the credit quietly taken, the smirk — and somewhere in the retelling your voice rises. You add details. You do the voices. Your friend, loyally, says that's outrageous, and you agree, and you say it all again with more heat. By the time you hang up, you've been angry for forty-five minutes instead of five.
We do this because we've inherited a story about how anger works: that it's steam in a pipe, and the only alternatives are release or explosion. It's one of the most intuitive ideas in folk psychology. It is also, according to several decades of research, mostly backwards.
The hydraulic myth
The idea has a long pedigree. Aristotle wrote about katharsis — the purging of emotion through tragedy. Freud and Breuer built early psychoanalysis partly on a hydraulic metaphor of the mind: emotional energy accumulates, and if it isn't discharged, it leaks out as symptoms. From there the idea seeped into everything — scream therapy, foam bats in counseling offices, the modern rage room where you pay by the hour to smash printers with a crowbar.
The hydraulic model makes a clean, testable prediction: expressing anger should reduce it. Vent the steam, lower the pressure. Psychologists have been testing that prediction since the 1950s, and the results keep pointing the same direction — venting doesn't drain anger. It rehearses it.
What the punching bag experiment found
The most famous test comes from psychologist Brad Bushman. In a 2002 study, participants wrote an essay and received insulting feedback on it — a standard laboratory provocation, and a reliably infuriating one. Then some of them hit a punching bag while thinking about the person who had insulted them, exactly the way catharsis theory prescribes. Others hit the bag while thinking about physical fitness. A control group sat quietly and did nothing.
If the hydraulic model were right, the first group should have cooled off fastest. Instead, they came out the angriest and behaved the most aggressively afterward. The people who did nothing — no release, no discharge, just a few quiet minutes — ended up the calmest of all. Bushman's summary in the paper has become the field's shorthand: venting to reduce anger is like using gasoline to put out a fire.
More recently, a 2024 meta-analysis led by Sophie Kjærvik and Bushman reviewed the broader literature on anger-reduction activities across more than 150 studies. The pattern that emerged wasn't about expression versus suppression at all. It was about physiological arousal. Activities that lowered bodily arousal — slow breathing, mindfulness practices, gentle movement — reliably reduced anger. Activities that raised or sustained arousal generally didn't, even virtuous-seeming ones like going for a hard run. Anger, it turns out, doesn't need an exit. It needs a downshift.
Why rehearsal beats release
To see why venting backfires, it helps to remember what anger is made of. It isn't just a bodily surge; it's a surge attached to an appraisal — a judgment, usually, that something unjust or disrespectful has happened. The heat and the story feed each other.
Venting works on both ingredients in the wrong direction. Physiologically, retelling the story with feeling keeps your heart rate and stress hormones elevated — you're re-living the provocation, and your body can't fully tell the difference between the event and the reenactment. Cognitively, each retelling is a rehearsal. You're not releasing the narrative; you're practicing it, sanding it smooth, strengthening the neural pathways that make it easier to summon next time. Psychologists call this angry rumination, and it's one of the better-documented ways a ten-minute irritation becomes a three-day grudge.
This is also why the punching bag made things worse. Hitting something while picturing the person who wronged you isn't discharge — it's rumination with cardio. High arousal plus a vivid grievance is precisely the recipe for keeping anger alive.
Co-rumination: when talking it out becomes digging it deeper
None of this means talking to people about your problems is bad. But there's a specific conversational pattern worth knowing by name: co-rumination, a term coined by developmental psychologist Amanda Rose. It describes what happens when two people rehash a problem extensively — cycling through the same details, speculating about motives, dwelling on how bad it feels — without ever moving toward perspective or resolution.
Rose's research, initially with adolescent friendships, uncovered a genuinely uncomfortable trade-off: co-rumination is associated with closer, higher-quality friendships and, at the same time, with increases in anxiety and depressive symptoms over time. That's what makes it so sticky. It feels like intimacy, because it is intimacy. The friend who lets you retell the story five times, who supplies fresh outrage on your behalf, is being a good friend by every social measure — while helping you rehearse the very appraisal that's keeping you lit.
The distinction, then, isn't between talking and not talking. It's between conversations that loop and conversations that move.
Processing without rehearsing
If venting is rehearsal, what does actual processing look like? The research points to a few working principles.
Downshift first, narrate second. Since arousal is the engine, take it seriously. Before you tell anyone anything, give your body a few minutes to come down — a slow walk, long exhales, even Bushman's control condition of simply sitting there. You're not suppressing the anger; you're separating the physiology from the story so the story doesn't keep reigniting it.
Tell it once, with an arc. There's a meaningful difference between a retelling that circles and one that travels. A useful structure: what happened (the facts, briefly), what it stirred up, what it might mean, and what — if anything — you want to do about it. The last two steps are what venting always skips. They're also where the emotional processing actually happens, the sense-making that lets the event become a finished story instead of an open wound you keep touching.
Choose a listener who asks questions. The most helpful person to talk to isn't the one who matches your outrage — it's the one who, after hearing you out once, asks something that gently changes the camera angle. What do you think was going on for them? What matters most to you here? If you notice a conversation entering its third lap around the same details, that's co-rumination's signature. Name it, and pivot.
Time-box the grievance. Give the incident a container — twenty minutes, one conversation, one page — and let the container end. This isn't repression; the topic can come back if it needs to. It's simply declining to give a Tuesday-afternoon slight an open-ended residency in your week.
The common thread in all of these is direction. Anger fades when it's processed — felt, examined, translated into meaning or action — and persists when it's merely performed, however satisfying the performance feels in the moment.
A place to tell it once
This is the quiet idea behind aside. When something has you spinning, the instinct is to broadcast — to find an audience for the grievance and run the loop. aside offers the opposite: a private place to step out of the loop and tell it once, with structure. Instead of an echo chamber that matches your heat, you get prompts that do what a wise friend does — help you lower the temperature, lay out what happened, and move from rehearsing the story to actually finishing it. No audience, no third lap, just the arc from what happened to what now. If your retellings have been feeding the fire instead of putting it out, you can try it at aside.lumenlabs.works.