I can fold my ears twice - so from the top of my ear I fold it towards the bottom of my ear and at the point where it folds I can fold it again across over the first fold.
Not a thing I can, but I once knew a person who could make their eyes go anti-crosseyed, as in left eye looking far left, right eye looking far right, away from their nose.
Is the little flap of skin under your tongue smaller than usual? Mine snapped clean in half once many years ago when my gf and I were getting frisky and I've had more range of movement ever since.
Next step, go behind it and reach your tongue up into your nasal passage above your soft pallet. Congratulations, you're now able to pick your nose from inside your mouth.
I've been able to do this for about a decade now because I got bored one day.
Sometimes when I open my mouth really wide, I somehow spray a little stream of saliva, like from a squirt gun. It makes me feel like the dilophosaurus in Jurassic Park, but so far I haven't been able to do it on purpose.
Sooo I can cause what honestly feels like a small and constant electrical current flow through any part of my body. If I center this feeling on my chest it is easily more prominent than anywhere else with my head being second. Extremities are dead last. If I am hooked up to a heart monitor I can make it freak out at will. Any location I focus it on tends to want to tense up.
I like to tell people this is the result of me grabbing onto a metal item when I was younger that was still hot. Couldn't let go for a solid 6-10 seconds, can't say exactly how long. What I am able to do feels very similar.
I can whistle with my lips just slightly open (like a ventriloquist).
I can make a really high pitched whistle like that and it confused the hell out of other people while they trying to find where the sound came from (high pitched sound is harder to pinpoint the location as it's bounce around the room).
But as I get older, I find it getting harder and harder to do so. 10 - 12 years ago I can whistle an entire song like that and it would sound crystal clear. Now it's really hard to follow a tune or make complex sounds.