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I can move my scalp and wiggle my ears. Nobody else I've met seems to be able to.
I can do this, in addition to being able to vibrate my eyes.
Can also wiggle each ear independently, though the scalp always moves along with them
Can most people not vibrate their eyes!?
I don't even know what this means, so I don't think so.
Its possible to learn how, but no, most people can't do it.
I have heard it helps reduce eye strain in dim environments though.
It is related to nystagmus. I thought I only did it on purpose, but when I am tired I also sometimes do it involuntarily.
From the link:
A slightly different form of nystagmus may be produced voluntarily by some (8% of) people. Some can sustain it for up to 35 seconds, but most average around 5 seconds.[19][20][21]
I graduated from this to accessing the muscles that open up sinuses, and can clear up most congestion with a little concentration. I wouldn’t have noticed except that I cured my headache problem that way, and it has baffled every health practitioner I mention it to.