Eyes Trick
Eyelid flipping
Turning the upper eyelid inside out so the pink inner surface shows. Most people with reasonably loose lids can learn it. Eye doctors do it to patients to look for grit.
No formal count Icky
Icky
4 oddities.
Spiritual 6Icky 4Not an emergency 20Get it checked 14Try it 62Learnable 20Party trick 19Vestigial 7Genetic 35Sleep 6Illusion 21Childhood 10Debunked myth 11Community 13Famous people 14Record 7
Mouth Trick
Gleeking
Shooting a thin jet of saliva from under the tongue, sometimes a metre or more. About 35% of people do it by accident now and then. Only about 1% can do it reliably on command.
~1% on command Icky
Mouth Involuntary
Tonsil stones
Small white or yellow lumps that form in the folds of the tonsils and sometimes come out when you cough. They smell bad and feel like something is stuck in the throat. They are harmless.
About 10% of people; up to 46% on CT scans Icky
Bones Trick
Voluntary joint dislocation
Pushing a joint partly or fully out of its socket on purpose, then back in. About 20% of people have some joint hypermobility. True voluntary dislocation is much rarer and often linked to a connective tissue disorder.
Rare; no formal count Icky