This Video Will Hurt

This Video Will Hurt

## This Video Will Hurt Please, put on your headphones — I promise
that there won’t be any loud sounds, but this video is going to hurt. There’s a study about
hypersounds and how they cause headaches: these sounds are too high-pitched to hear
— like the one added to this video, playing right now — but cause headaches they still
do. The hypersound in your headphones is pressing
on your inner ear, stressing the nerves leading to your brain where, if the headache hasn’t
started already, it soon will as exposure causes headaches after only ten seconds. Oh my. Can you feel it? That pressure on your ears
spreading to your now throbbing brain? Because… …you shouldn’t: the study is made up and
there’s no hypersound in the audio, but still some of you will have began to feel a headache.
Why? The nocebo effect. A nocebo is a harmless thing — like a video
with nonexistent hypersounds — that causes harm — like a headache — because you *believe*
it’s harmful. That sounds like Voodoo, but there’s science behind the nocebo effect,
which is more than an irritating parlor trick, it causes real problems like in medicine. When testing a new drug doctors get a group
of sick people give half of them the new drug and give the other have a fake pill that does
nothing — but which they’re told is real. This is how science finds the stuff that works
amongst the junk that doesn’t. But new drugs have side effects and sometimes
patients drop out of the experiment because of them. No surprise there. But some people on the fake *also* drop out
from the side effects. Side effects they’ve gotten from a drug they *aren’t* taking. But
because they *think* they’re on the real thing, they’ve also *thought* themselves into the
side effects. Now maybe this is just a case of misattribution:
people get headaches and, if they’re joined a drug trial that lists headaches in the side
effects, it’s natural to blame the new drug — and that certainly happens to some extent. But the nocebo effects is more than just misattribution,
it causes real, additional harm that scientists can measure in cruel, cruel experiments — and
this is one of the reasons there not an over abundance of research on nocoboes: approach
your friendly neighborhood ethics board with an experiment designed to hurt people and
they’ll frown on that. But sometimes nocebo experiments do get approved to the benefit
of science and humanity, if not the participants. For example, under the right conditions some
people who expect a harmless injection will give them a rash will get a rash, but for
people who expect nothing to happen, nothing is exactly what happens. And fake pills can be additive: take test
subjects off pills they believe are addictive and some will experience nocebic withdrawal
symptoms — like pain and fatigue — from the pills that they could never have been
addicted to in the first place. Another experiment gave people harmless injections,
told half of them to just sit there and told the other half that their pain would increase
for the next thirty minutes — which it did. But in this situation there is a drug that
can block the nocebo effect and those who were told the injection would hurt, but were
also secretly given the nocebo-blocking drug did *not* report an increase in pain — showing
that the nocebo effect is a real, physical process. In all these nocebo experiments it’s the belief
in harm that matters. If someone dressed as a voodoo witch doctor popped up and hexed
you with a curse of great pain — no effect. But, in a room with a real doctor and his
clipboard and a big science machine and a needle in your arm, you’ll take his words
rather more seriously. Which is why doctors say: “This won’t hurt
a bit” rather than “Oh this? It’s going to hurt. Like *a lot*.” — which, by the way,
was a real experiment done on women undergoing labor during spinal injections. Guess how
that turned out? But nocebos don’t end here. While illnesses
like the flu, spread from contact with disgusting, germ-infected humans and the things they touch
with their, disgusting germy hands — a nocebo spreads from mind to mind, no contact required. A notable example happened in a Tennessee
high school. One teacher reported a strange smell in her classroom and developed symptoms
of headache nausea, and difficulty breathing. These symptoms spread to some of her students
and from them to others in the school. Almost two hundred people ended up at the local hospital
but all medical tests came back with nothing, nor was anything harmful found at the school. This was a nocebo — the belief that the air
was making them sick — spread mind to mind. Everyone who got sick heard about the symptoms
from someone else. When this happens, it’s called mass psychogenic illness. The treatment in these cases is to separate
those with symptoms from the rest and reassure the ill that yes, their symptoms are real,
but no they haven’t been exposed to anything toxic, and yes people are getting better quickly: The last is one of the indicators that separates
a real poison gas leak or biological weapon from mass psychogenic illness. But the final
factor, number of cases increasing with greater media coverage, can lead to this kind of thing
spreading far and wide. Take, electrosensitives: people who get nausea
(among other things) from exposure to parts of the electromagnetic spectrum, notably WiFi
the density of which is increasing over time, forcing particularly bad sufferers to retreat
to places like the creepy-sounding radio science zone in, where else, West Virginia. But put electrosensitives in a room with a
WiFi router and they can’t actually tell via their symptoms if it’s on or off. Instead
their symptoms track with being told if it’s on or off. And if you make a group of people without
electrosensitivity watch a news report on how Wifi makes you ill while another group
watches something uninformative and afterward expose both groups to a fake Wifi signal only
some of those who watched the news report feel sick. There’s a similar phenomenon called ‘wind
farm disease’ with similar side effects, which turns up where it’s been talked about on the
local news, but not in other places in the same country with the same wind farms where
it isn’t. All this makes it too easy to mock people
for thinking they’re getting sick from WiFi or Wind farms or *Wind farms with WiFi* — but
it’s important to realize they’re not crazy, the side effects are real, they’re just wrong
about the source: all evidence points to the belief in electrosensitivy as the cause of
electrosensitivity. Which means the news reports talking about
these illnesses are spreading a kind of mind virus. And while these are exotic examples,
there is also evidence that some allergies and asthma cases are nocebic and thus able
to be spread in the same way. To be clear: if someone’s having an asthma
attack, that’s not the time to tell them you know they’re being a drama llama because you
watched an Internet video about the nocebo effect. *They’re really having an asthma attack*
and they *really* need something to make it stop and that’s *really* not you showing off
your knowledge. Harmful things aren’t harmful just because
we believe they are — the right dose of arsenic will kill you as surely as an anvil to the
head, no matter your insistence otherwise. But the nocebo effect does show that our beliefs
about otherwise harmless things can make them harmful. Which means that our voodoo doctor’s hex from
before really could work, but only if you were foolish enough to believe him.



  • Munch Mations

    Wow I actually felt a headache

  • Honey Mist

    Hah I didn't get a headache you fools

  • Wimeth Dissanayake


  • nizcomix

    well i have a headache now, thanks grey

  • Wretched Pleb

    I still heard the sound

  • That One Gacha Girl

    <— me watching the video

  • DaDARKPass

    I laughed instead.

  • Anthony Bury

    My ears started burning and continued after you said it was fake sooooooooo

  • RDS Scarlet

    I could hear the first one

    Edit: nvm

  • Jack tutu


  • jahva


  • Chongo Ok

    i could hear that

  • Max Pearson

    I heard the sound at the beginning how tf

  • Horizonshot

    Oh like that spongebob episode where gary bites everyone and we zombie squidward

  • ParisChristianne

    Grey you bastard you made me get out of bed and go get my headphones only to take them off 45 seconds later 🙁

  • rootlis

    Wreath-fire bee, huh

  • Alfredo Castillo

    Booo click bait, no pain boo

  • Nicholas MarioNguyen

    Don't eat the marshmallow or you will be doomed to be a failure

  • IskandarEasyToFindThisAccount Dhiaurrahman

    Oh my god. Electrosensitivity is a memetic hazard. Time to call [REDACTED]

  • Stamose

    wait isn’t this the placebo affect

  • kanae rin

    Knowledge is power..
    Thats why, sometimes its better if u keep yourself ignorance..

  • Nicky_08

    Second time i Saw this it still hurt

  • Daniel McGibbon

    I actually felt pain

  • Daan Strik

    At least I didn’t get a headache at the start.
    Also that stuff is made up? Game theory lied to me goddammit

  • Ertiza Kazi

    I guessed it was nocebo lmao

  • wayne raab

    yo chill

  • Frump Beard

    Literally the first thing I thought was that any sensation I felt could easily just be in my head.

  • Observer29830

    Alright, lets see how this works…

  • Ash Dark

    Me watching this video after the 100th time, being immune to the trick.

  • Ash Dark


  • Nflame

    I didn’t put on my headphones haha

  • Chris Odom

    Didn't get the headache but I totally heard a constant high pitch sound…

  • bobby baker

    The "toxin air" thing happened in SoCal during a small natural gas leak.
    After the leak was stopped, people complained about headaches for a month. A lot of local news picked it up.

  • Ethan Miranda

    I knew it was fake before I watched the video, but my head still hurt

  • Plaid Penguin

    The science behind it hurts

  • Ben Amon

    At 0:12 there actually is one

  • Telowst wharf 614

    First time watching the begining: no or barely any headache.
    Second time watching the beginnig after seeing the whole video: mild headache.



  • Master Miner

    wait what

  • Chris Russell

    is it just me or is our whole society just one big "mass psychogenic illness"?

    gotta look good. be connected. have the latest gadgets. money is all that matters. etc etc etc…
    the media, the advertising, the soapies and reality TV… just spreading the infections…

  • Caleb Thornberry

    i hear the sound

  • Christopher Franklin

    After he told me it was fake, the pain didn't stop. My ego continues to hurt.

  • hFg

    AAAAGGHGHGGHGH IM DYIIING AAAGH ITY HURTS SO MUCH IIAFCSDAGSDGSG, why though ?oh because grey said so oh nooo CGP grey is god he controls our lives help im delusional and making stories up

  • The Redstone Fur

    6.9 Mil views nice 👌

  • the opinionated idiot

    Well let's just say I suffer from migraines and that 'red Herring' actually gave me one, thanks

  • Otto Vain

    Thanks for the head ace

  • Minibray

    Yo I got really fuckin scared at the start because my ear started ringing while he was explaining it.

  • my dick is a tick-tac but,

    Oh I just had a headache before this video

  • LOLGamer27

    Your foolish tricks won’t work on me!

    Why you ask? For you see…


  • FireCarf

    I actually grabbed my headphones after he said that the sound was playing

  • Atow

    My mom gave me Russian honey and told me it would help me fall asleep it did when she told me it was fake I felt really dumb

  • Light Yagami

    I don't like that the video preview replaces "this video will hurt" with "Nacebo effect: a harmless thing that causes harm".
    I saw this video before that, but upon returning to this, kind of ruins the whole point of things, doesn't it?

  • sub to me to feel nothing but disappointment

    joke's on you, i already have a headache

  • gaiming psyko chunk of Borderlands

    So you dont need dengerus gaz u only need to make them think that there is

  • 20PercentRendered

    I thought it was the power of suggestion


    its nooooot nocebo, its Placebo!!

  • Ashley James

    In Australia there's speakers in the City playing squealing noses to stop homeless sleeping everywhere…
    The poor bugers

  • Humans In They’re Natural Habitat

    I feel sad for the people who made this because they would have to hear the sound 100000000000 times

  • Shadi Abdallah

    I already had a headache tho

  • Infinite Rage

    Isn't the word placebo

  • Golden Flame

    I thought something was wrong with me because my head wasn't hurting at all. I literally tried to squeeze my brain to make it hurt. Then you said it was a red herring facepalm

  • The Cereal Guy


  • Robert Eischen

    I fell for it. Kinda disappointed in myself. 😓

  • David Kent

    I could hear it the instant before he said "it's too high pitched to hear and is playing right now" I heard it
    He got me, darn it you got me

  • Tigrezz

    I didn't get a headache at the start of anything, really. Is it possible to be immune to the nocebo effect? I immediately noticed after 18 seconds of the video starting that it was fake. How is that?

  • Turtle Shell

    I didn't want to watch this, because I read comments saying "Oh it's clickbait" and I thought everyone was trolling me lmao.

  • I don’t Know

    Good thing I have a head phone that is broken off

  • Totally the Real ninja

    I got a headache, 10 minutes beforehand

  • Владимир Стрельников

    Okay, fuck it, i watched this video before and i knew that this "hypersound" bullshit is bullshit, but i got the headache anyway!

  • pleonektein


  • CynDystro


  • Nexnang 122

    I heard the sound 🤔

  • lulu magic

    I wanted to watch it… but

  • General Geography

    What if the nocebo affect is a nocebo affect

  • British Baguette

    The nocebo effect nearly happened to me when I accidentally drank Holy water and my mum then said that drinking Holy water would kill you, I believed her. If the nocebo effect did happen I would be dead.

  • Ele Os has a gun

    My head hurts when 5gz sleep dream things it’s weird

  • Jamy Chong

    Guess I'll just be a pet human for some robot then "woof woof"

  • Zheep-x

    God dang it I started watching this again and remembered about the nocebo, instantly started feeling a headache, even before he mentioned it

  • Andy J

    0:09 …but I can here it

  • TheDuckSCP

    Plot twist: What if every drug and every sickness in the world is nocebic and we just don't know it.

  • Mev Cilbox

    When you don’t get hurt

    you can never be a gamer but it’s not a bad game and you don’t deserve the money you have guns you have to go to buy it and get the game to play it because it doesn’t have to be a gamer but it is a good thing you can’t get a good thing to play it and it is kinda like it is just a good game but it’s a very good thing to get it back on it and I will have it to go back and get the new one and get the better and the game is better like it has been good for me but it has to everything I wanna is now a good way of playing it but I cannot is the game that you have a good thing you have to get a game you can get to play it because it has the game play you get the money 💰 was a good game it would never have to end a lot of the time it would be like a gamer and a friend of a friend or you can never be a good thing to happen when you get the money.

    you read that …. well I didn’t type it….. I just press the words on the top of the keyboard

    Sorry if you wasted time

  • QuantumGaming

    I felt a headache and heard a high pitched sound.

  • Rafael Lourenço

    Me wanting to get headache at the beggining and not getting one :c

  • Retro Robot

    I've put off watching this video for 5 years cause I didn't want a headache…

  • The Cringe Lord


  • Tancredi Vessio

    “A big cience machine”

  • Carl L

    Isn't that "placebo"???

  • Pokevee 2

    Am I the only one who actually heard the first sound

  • Extra Regular

    I felt the high pitch sound thing at the end
    don’t test it

  • Lojtar

    Salem witch trials type beat

  • Sma6658

    Knew it

  • UeUeUdk

    hint: you dont feel pain becouse grays voice overpowers the sound

  • R. S.

    I thought this was the placebo effect? Or is that something different and I'm just dumb

  • Maukustus

    Why can i hear that

  • LemonGamer

    "Some of you may feel a headache, why?" Yeah, maybe because youtube recommended me this while i am having a headache

  • meh

    wow i hear like a unushual noise cool

  • Taym F0120

    I still have a headache

  • Jacob Hopkins

    "Too high pitched to hear", proceeds to play a blatantly loud high pitch ring. Too high pitched for who? Boomers?

  • Timothy Sterling

    "Sound too high pitched to hear?" 😫 I HEARD IT! Ouch!

  • Zorua Alpha

    We've been put under a genjustu the entire time with fake viruses!

  • Abraham crum

    I thought it was pronounce placebo

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