Google told me: The Gorlin sign is a medical term that indicates the ability to touch the tip of the nose or chin with the tongue. Approximately five percent of the general population can perform this act, whereas fifty percent of people with the inherited connective tissue disorder, Ehlers–Danlos syndrome, can.
I can do that. I can also reach one arm over my shoulder and the other up from the bottom of my back and lace my fingers together (in part because I have long fingers).
Most of my joints are like Rice Krispies (snap, crackle, pop), but I can’t crack my knuckles. I
can pop my left thumb in and out of joint (and do so as a stim sometimes, it doesn’t hurt), but only the left.
But I don’t have any sort of connective tissue or hypermobility syndrome.
I can look in two different directions at the same time. I have congenital Brown’s syndrome, which means that my left eye will not move up much beyond halfway, but my right does. I used that as a starting point, it’s easiest to move my left eye around while keeping my right far enough up that its vision is blocked by my eyelid.
Touching the right place on my side (either one) causes a really weird sensation that makes me cringe away.
Instead of gagging when getting a throat swab, I instinctively reach up and try to pull the swab out. I have to actually sit on my hands to not do it.
And I could write a whole nother page on weird sleep things.