Show HN: Bodily Oddities
A small web project cataloging “bodily oddities” — strange but usually harmless sensations and abilities like brain freeze, photic sneezing, sleep paralysis, geometric nightmares, and voluntary ear-tube opening — prompted many readers to compare notes on their own experiences and realize how much human perception varies. Commenters highlight how often people assume their sensory world is universal until they discover others don’t share things like falling sensations in the legs, hypnagogic flashes, or the ability to trigger goosebumps. The site also becomes a springboard for debating AI‑assisted “vibe coded” websites: some celebrate how LLMs let individuals rapidly build quirky, indie-style projects, while others criticize the reliance on Wikipedia, the generic prose, and flawed AI-generated images.
Overall reaction to the site
- Many find the collection of bodily oddities fascinating, fun, and “wholesome,” with several people compulsively clicking through to see which apply to them.
- Some wish this kind of information were taught in school or compiled more often, seeing it as a useful normalization of strange bodily experiences.
- Others criticise the heavy use of AI for text and images, calling it “vibe coded” or “AI slop,” and complain about malformed hands and weak sourcing (mostly Wikipedia).
- There’s debate over AI’s role: some see LLMs as empowering a new “indie web” era and enabling many side projects; others say these projects were always possible, worry about surveillance, code opacity, and a flood of low‑quality content.
User-reported bodily oddities
- Reflexes and sensations:
- Photic sneeze reflex (sun-triggered sneezing), often familial and surprisingly common among commenters.
- Brain freeze: some get severe, frequent pain; others report never having it or losing it after childhood.
- Call of the void, “piss shiver,” “precordial catch syndrome,” “proctalgia fugax,” random sharp chest pains, and “brain zaps” are mentioned and sometimes linked to site entries.
- Rare-ish control tricks:
- Voluntary Eustachian tube opening (“ear popping”)—seen as extremely useful for divers and often self‑taught.
- Voluntary piloerection (goosebumps) and ear-moving; some can do them on command, others cannot.
- “Turning off” the nose by closing the nasopharynx; one commenter notes this is essentially the same muscular action as producing certain speech sounds.
Sleep, perception, and hallucination phenomena
- Multiple reports of:
- Sleep paralysis with presence hallucinations, fear, or complex imagery; some find it terrifying, one person actually misses it.
- Hypnagogic and hypnopompic auditory illusions (doorbells, alarms, loud knocks) and Exploding Head Syndrome–like experiences.
- Geometric or “big-small” nightmares, often with fever or cannabis withdrawal, featuring abstract shapes, size contrast, or line/gear imagery; several are surprised others share near-identical patterns.
- Visual oddities like floaters, polarization perception (Haidinger’s brush), flashes when dozing off, and “worms” in vision after exercise.
Health anxiety and uncertainty
- Some express anxiety about random pains and online self‑diagnosis, noting how easily any symptom seems to lead to serious disease when researched.
- A few mention specific conditions (e.g., BPPV/canaliths, costochondritis, PVDs), but medical explanations remain mostly anecdotal and often explicitly labeled as non‑expert or uncertain.