I can recite PI to about 40 places.
3.241592653589793238462643383279504197169399
It has no meaning/use/relevance in the real world but I can still do it.
I can also hold my breath for about 3 minutes.
What can you do?
Um… You got it wrong, though…
When come back, bring Pi.
I can fart the lyrics to the theme from M.A.S.H.
I can ride a unicycle.
I can lick my elbow…
I can make my index fingers click (as in the last knuckle) just by moving them.
I can vibrate my voice box, making a sound from a giger counter to a kittycat purring to some godawful hell-hound snarling sound.
I can also emit an ear-piercing screech like a harpy through inhaling, but I don’t tend to do that too often as it is actually remarkably painful! 
Go me!
I think I can do the voicebox purr/snarl as well, if your voicebox purr/snarl is the same as mine, that is.
ghrrrrrrrrr!
Other than being able to whistle above the human thresh hold for hearing (proven by the response from dogs), I can also create some rather startling hawk-like screeches while inhaling, and whistle while sucking in, not just blowing out.
Other than that, I do not think that I can actually mention my other talents here…
I can play tunes by cracking my toes. it’s pretty
Much to Mrs. Dante’s delight, I can clover leaf my tongue.
Much to Mrs. Dante’s dismay, I can grow wildly erratic and freakishly long eyebrow hairs.
HA! I got the first decimal place wrong.
I can start a thread in MPSIMS while smashed and make a huge error. 
I can belch my name…
**
Awe, c’mon, there’s gotta be another doper who has a rebuttal for this!
I can make a squeaking noise with air trapped between my teeth and cheek and tapping on my cheek with a finger. It is ideal for distracting crying children.
I can also wiggle my ears.
I can stand on my head, without any wall or aid, with kids, dogs and loud music all around. ( I have zero concentration the rest of the time.)
i can open beer bottles with my teeth (heineken).
you can feel my bones pop out if you pull my big toe.
i can feed the baby and cook dinner at the same time, while carrying on a conversation with a 4.5 year old (yeah, well, i can).
i can bring home the bacon, fry it up in a pan…
i can inhale a string in my nose and swallow it until it comes out my mouth … brain floss?
i don’t want to be the first to name the x-rated stuff i can do, so i will stop there
Hmmm… A cute, petite red head, standing on her head… Sure, I could do that! But, it wouldn’t be pointless or mundane! 
I can ski into the same tree, three times in a row, and be snow mobiled down to first aid with a bleeding head after the 3rd try.
I can hammer a nine inch spike through a board with my penis. There, I started it. Now… out with the X-rated stuff!
I can shotgun a 12-oz can of beer in just over two seconds, while standing on my head.
I wish there were words to decribe the face my nondoper SO just made over my shoulder reading that.
You just made my day.
I can pop my right ankle in and out of its joint. I think it’s because of a badly-healed sprain when I was 11, but I’ve never been quite sure. It mystified the doctor and physical therapist I went to, though.
The worst part is that sometimes when I’m trying to fall asleep it feels “itchy”, so I’ll just pop it in and out to make it feel better. Drives the wife crazy.
I can blow spitbubbles pretty far.