Show HN: Bodily Oddities
When I was about 11 years old, my best friend and I were playing during recess at school, and I was carrying him around on my back, presumably pretending to be a multipart attack robot. All of a sudden, my heart started hurting, and I collapsed to my knees, and the robot was no more. Every time I inhaled, it would feel like a spike was being driven into my heart, and my breathing got completely shallow. I was sure I was done for, when all of a sudden, after an exhale, it disappeared.It wasn't until I was in my twenties that I learned this was called Precordial catch syndrome and it happens to most everyone. Every friend I've told about it was surprised, and also most knew the feeling.I collected a growing list of strange things bodies do ever since. And now finally I made it into a little page for others to see:https://vester.si/bodily-oddities/It includes a form to tell me about new things, if you think they belong on the page. Feedback welcome!
172 points by vesterde - 142 comments
I wish I had kept a notebook of this stuff as a kid, I remember having a lot of odd experiences and sharing them with my friends, but it was so long ago now.
I think most of them were visual oddities.
I remember seeing floaters for the first time, and asking my mother about them.
"Oh, that's just [neighbor] throwing trash out the window."
The delights of growing up in Eastern Europe!
I also get these "worms", bright glowing white. I heard they might be white blood cells moving through capillaries, but why would they be glowing? I usually see them after cardio.
Another fun thing to do is to stare at one point until your entire visual field goes grey (the afterimage cancels out the image... "neurons get tired" or something), then slightly move back/forward or slightly rotate your head, producing very interesting patterns from the interference...
I should write a book...
Bzzzzzzt!
I also get floaters in my eyes sometimes which is weird because they appear outside your primary point of focus, which you move to get a better look, but because the floater is in your eye then it moves away as you shift your direction of focus. A strange experience.
I also get hypnic jerks in my legs when I am tired - the leg twitches - it's a sign I'm at absolute peak need for sleep.
I once revealed to friends that I get Pee Shivers, assuming everyone does - they do not and I was laughed at. :-)
Oh. and I am a voluntary burper.
Now you know more than you ever wanted to.
I attribute them to the fact that, while trying to sleep with a fever, my eyes are half-open, and any sharp object becomes a visible geometric shape that my brain attempts to comprehend but almost fails to. I still experience them in adulthood. I’ve never had sleep paralysis, but whenever I think of people who have it, I imagine it feels as debilitating as these half-sleep experiences where you’re unable to move while your brain processes distressing memories.
“Geometric Nightmares” is not a scientific name. It is simply the name given to this phenomenon in forums [1][2] where people discuss and share their experiences.
[1] https://www.reddit.com/r/Dreams/comments/7ofu86/x/
[2] https://www.reddit.com/r/geometricnightmares/
Maybe there is something about "contrasts" as they all seem to be vaguely related to "big difference" basically.
And, anecdotally, I have gotten a similar feeling reaching deep enough meditation.
it's one of the things that fighter pilots are screened for. The reasoning is that they can't have a pilot looking down and dark ground, look up to scan for enemy fighters and start sneezing.
Some people with the reflex can also have multiple sneezes in a row.
I find this all fascinating as:
- I have this
- I was also born with no sense of smell
0 - https://en.wikipedia.org/wiki/Photic_sneeze_reflex
I think that is unrelated to the sun-sneeze reflex though, some people that don't have that reflex can sneeze multiple times in a row, and vice-versa too.
Never knew that it was part of fighter pilot screening, that is interesting.
They all think I am insane blaming the sun for my sneezes.
I get the occasional Hypnopompic auditory illusion ( https://vester.si/bodily-oddities/oddities/hypnagogic-halluc... ). This is when you think you hear a sound as you wake up. For me it is normally an illusory door bell. It is very convincing. You rush down to the door and there is no-one there and my wife heard nothing. Maybe happens 2 or 3 times a year.
I also get the occasional weird nerve shock. It feels like an electric shock down through my collar bone. It lasts less than a second, is always completely unexpected and is quite unpleasant, enough to make me flinch. It doesn't seem related to what I am doing. Maybe happens 6 times a year. Didn't see it mentioned. Does anyone else get this, or am I just weird?
Headcanon: Cortisol spike right before you wake up. Brain goes, "something must have alarmed me", and cooks up phenomena: loud noise, feeling of falling/tripping, etc.
About the second thing, I have felt something similar. Especially the part about it originating around the collar bone and neck. It's probably something like a nerve misfiring. I sometimes think it's weird that the body doesn't misbehave more often than it does, it's an enormously complex system after all.
Possibly. Or a pinched nerve.
I don't think it is a cosmic ray, or it wouldn't always occur in the same part of the body. ;0)
>I sometimes think it's weird that the body doesn't misbehave more often than it does
Indeed.
Also prosopagnosia https://en.wikipedia.org/wiki/Prosopagnosia
The feeling that you haven't experienced something before, which should by all accounts feel familiar to you.
>A study by Chris Moulin of Leeds University asked 92 volunteers to write out "door" 30 times in 60 seconds. He reported that 68 percent of volunteers showed symptoms of jamais vu, such as beginning to doubt that "door" was a real word.
I also like this poster:
https://files.catbox.moe/ejj1jl.jpg
It all goes away during the summer somehow.
[1] https://en.wikipedia.org/wiki/Epley_maneuver
Fortunately, the Epley maneuver is very effective, if done correctly. Unfortunately, if done incorrectly it can worsen the symptoms. It's all about identifying in which semicircular canal are the otoliths before moving them.
I can fully block smells or breathing by doing something that feels like inflating a zone between the top of the mouth and the nose. When speaking it will sound as if I am pinching my nose without hands. Comes in handy when having to face horrible smells.
I assume everybody can do it but many don't know how.
https://www.reddit.com/r/TooAfraidToAsk/comments/ysd5o2/is_i...
https://www.youtube.com/watch?v=USB90D7ywiE
I remember reading about the phenomenon, that it was colitis (inflammation of the arse, presumably due to gut flora imbalance).
It was never diagnosed but I'm pretty sure it was costochondritis - something in my sternum area was inflamed and would give off this awful shooting chest pain.
(Made funny faces in the mirror for an hour.)
Thanks to everyone!
https://vester.si/bodily-oddities/oddities/hypnagogic-halluc...
>I also see a flash of light with my closed eyelids.
You might want to talk to a optician about that. It can be a sign of issues with your retina.
I see flashes in a dark room when I wake up, because I have PVDs (posterior vitreous detachment) in both eyes.
Edit: I just re-read your post. If they both happen together, I think it is something different.
It happens simultaneously with the sound, so I would guess it is purely a weird form of synesthetic hallucination.
BTW sleep paralysis is likely the cause of many 'alien abduction' reports: wake up, can't move, presence in the room, sexual element (e.g. probing!).
I don't have much sleep weirdness, but when I'm about to fall asleep, I frequently imagine 3D object spinning and rapidly changing size. Kinda like the 3D TempleOS sprites [1], but 5x faster and increasing/decreasing size at the same rate.
1. https://youtu.be/LtlyeDAJR7A?t=451
Also always accompanied by fear.
Interestingly the belief of what the presence is has changed with culture. It used to be demons, now it is more likely to be aliens.
Definitely not pleasant, even when I'm rationally aware of what's going on.
I've never seen the shadow man or anything.
That said, really good job here for those that can enjoy it without inducing panic attacks!
V1 looked like complete Opus slop, but since I make many little sites all the time I can get it to undo a lot of them, one at a time. I just explicitly tell it the aesthetic to avoid per-element (like the famous left border), and eventually it looks okish.
Edit: Ah and for text, Standard Technical English is a good instruction to give it, but I also told it to be dry and technical, and no embelish or do storytelling. And some manual editing out of cringe stuff still after that.
"the alarming ones that are harmless" - We don't put dependent clauses at the end of sentences like this except for unusual emphasis
'quietly' - overused by Claude
the entries here are the moments where the guesswork shows - same as first example
"none of this needs damage or disease" - Also would be written differently as a human. Just try saying some of these things aloud and you'll feel odd
'unknown. nobody has counted it'
> One hypothesis joins the two.
This is 100% a good thing.
I love this website. It's fantastic. I don't care if it's AI. The world is better for it existing.
Phoned in websites / AI slop is not a good thing.
Code something yourself on neocities.
Infinite randomly generated slop + The Algorithm = Extremely personalized value delivered
You get downvoted for being weirdly ecstatic about AI "enabling" things that were already possible, while not caring about the human element that AI lacks.
Maybe you were born a few decades too late. I feel I was born (a few decades?) too early.
I want the world with cures for cancer, holodecks, brain uploads, immortality, jet packs, surfing on Titan, etc.
I legitimately enjoy the future we're hurtling towards. It's the most exciting thing that has ever happened to our species. I hated the world where "Apple iPhones" were the pinnacle of human achievement.
We might be able to vibe engineer our own iPhones in a few years. That'll be fun.
There is literally nothing about generating websites with AI that merits being called "the most exciting thing that has ever happened to our species."
FFS we've stood on the moon.
The fact that people who couldn't program can now build utilities and automations for themselves is beyond remarkable.
And for those of us who can engineer, we're making 10x, 20x what we were before. I'm filling my life with all kinds of fun side projects, toys, games, utility software, automations. I don't look at libraries and software packages anymore - I just build what I need.
This is like 3D printing for software.
I've built my own SRS software, my own music library, my own project management software, several agents, a video editor, a few toy video games, home automation software ... and I've done this all in a month.
I am so excited about everything I'm going to be building. Time was a limit before. There is no limit now.
> FFS we've stood on the moon.
And we slept on that for nearly 60 years. We're about to build cities there. Finally.
We're really, really not.
Learning to program has never been easier or more accessible. Being able to build a website has been accessible to non-techies for years. I'll admit using an AI is convenient but "beyond remarkable" is pushing it. If anything it's a bit of a tragedy. In exchange for that convenience people are buying into a closed, third party mass surveillance infrastructure generating code they can't understand, can't repair, can't edit or redistribute. From a FOSS point of view AI is objectively worse than what we had. And that's not even getting into the flood of slop and disinformation destroying the web.
>I've built my own SRS software, my own music library, my own project management software, several agents, a video editor, a few toy video games, home automation software ... and I've done this all in a month.
I can't imagine you needed all of this done within a month and couldn't find existing solutions for most of it. It seems more like you're addicted than being productive.
And I still don't see the line between you vibe-coding a productivity app something something holograms and brain uploads and surfing on Titan.
>And we slept on that for nearly 60 years. We're about to build cities there. Finally.
No, we aren't. We're no closer to than than we were 60 years ago. If you think Elon Musk is actually going to accomplish anything of the sort I think you're bound for disappointment.
https://vester.si/bodily-oddities/oddities/voluntary-eustach...
For me, I'm pretty sure it's related to having just awful seasonal allergies as a child - I'd quite often get stuffed up and have an unfortunate amount of pressure in my sinuses and ears. So then I'd pinch my nose and try to adjust it, eventually realizing I didn't need to pinch my nose.
I can do it on command but never paid attention to how before.
It's basically "yawning manually". There's a couple different muscles activating at the same time, most irrelevant to the popping, I can't control them individually yet. (Probably learnable, if I practiced I could probably get the pop more efficiently.)
But yeah, just yawn real wide, that should do it.
A lot of stuff is learnable, like I couldn't move my ears but taught myself how to do it because I was bored.
I've been making this list for years as markdown files with a few sentences and links to wikipedia (or xkcd for his visual field comic), but the site is indeed made with the help of AI.
Fabulous site.
As they said in school (and is still valid here) - Wikipedia is never to be your primary citation. This website commits the sins of citing Wikipedia and ONLY Wikipedia.
Life in prison (at least)
But more on topic, this site is a cool idea but with the lamest execution ever. Whatever effort you might have put into collecting these phenomenon is overshadowed by the lazy AI slop. It doesn't seem like you're earning anything from this, so you just donated money to Anthropic/OpenAI/whatever in order to underwhelm/revolt/possibly-mislead some people. You could've done that with a simple goatse link for free.
Don't know if this has a name.
(Don't suppose you'd include orgasmic quiver?)
Synesthesia is multifaceted. When I was a kid I used to feel a shape in my hand whenever I felt a certain emotion. That went away in my 20's. Later as an adult I guessed it was a kind of synesthesia.
Also had 3 more complex emotions/feelings/states that were a blend of certain particular things, not always that connected. For example one was mostly a combination of memories of my grandad's past (he died before I was born), and the Ratchet and Clank level "Metropolis". Similarly, the actual feeling of these is now gone. Anyone else have something similar?
The closest I've heard to that was Brian Eno in his film talking about something similar he seemed to have growing up with the colour purple.
very interesting google results for this one lol
Yes, a rare but real human affliction.
Still waiting...
Great site
It's not uncommon to assume that other people's experiences are like one's own until told otherwise. For me, it took until at least age 10 before I realized that other people aren't near-deaf on the left side.
It's on me for randomly checking comments to see if people are acting in bad faith. Sometimes, they are.
edit: and apparently AI-generated site layout too. Either it doesn't bother me as much as the writing, or I haven't seen enough examples, but I didn't notice that.