I can play the fiddle solo from “The Devil Went Down to Georgia” on my farting palms.
My wife does the cherry stem tying thing. Then she gives it to me and I untie it only using my tongue. What’s that supposed to mean?
I can fix a computer just by looking at it (or so I’ve fooled several users into thinking). I can also crash it with a wave of my hand.
I can flip a cigarette out of it’s pack and up into my mouth with a single flick of the wrist (about a 1.5 feet from pack to lips). I can’t remember what movie I saw this in (a James Dean one perhaps?), but I’d already been doing this for a while before I saw it.
I also do that finger-crossing thing that MacSpon posted.
I’m also very good at convincing vending machines to take my money (or someone else’s), a la CadburyAndgel, both bills and coins, but I don’t pet or sweet talk the machines. I got skillz.
Does the ability to vocally reproduce the high-pitched “Yi-Yi-Yi-Yi-Yi-Yi-Yi!” sound from “Xena: Warrior Princess” count? Because I can.
I can also scream exactly like a whistle, it’s ear-shattering and useful for scaring the CRAP outta people (Huzzah!)!!
I have a slight knack for finishing other people’s sentences when they can’t possibly find the word their looking for (they may just be trying to be polite, as far as I know).
I can also tell you what other movies/shows/commercials, etc… the actor in the film you’re watching has been in (90% success rate). It’s just the special-ness that is ME…
Dig it!
Wiggle my nose like a rabbit.
Croon most fractious children into a hypnotic trance which their mothers take to be a critical mothering skill. All you have to do is touch the kid to break it, so a very fragile trance.
Wiggle my ears, but not independently of one another.
I can whistle using my tongue. I roll it into a tube and blow through it and it makes this interesting hooting noise. You can hear it at home.wi.rr.com/elfbabe/hoot.wav - be warned, it’s about 1.5 megs as I’m having problems with my MP3 encoder.
Anyway. I swear that that sound doesn’t use my vocal cords at ALL.
I can escape from handcuffs every time.
I totally agree! believe a park will be there and it usually is for me too.
I can fold any bill of money into a bowtie.
I can do a pretty good Mae West impression.
I’m pretty good at predicting the sex of a baby before it’s revealed.
i can smoke a pack of cigarettes in under an hour. yes i can.
I have an amazing memory for completely useless information.
For example… tell me your name and I’m apt to forget it ten minutes later. However, I can give you the name of the obscure actress who was in a movie I saw once, 12 years ago. Seriously, it’s happened.
A list of the utterly useless skills I have:
whistle by both blowing and sucking…I can do this super-easy because I learned to whistle by sucking long before I could ever do it by blowing.
snap the tune to any song I know
pick up things with my feet
put my legs behind my head (I am male, BTW)
I also have the ability to NEVER ask a girl out because I am too shy and also get a C in a class that I only did half the HW for and got a D or F on all the tests.
Heh, the BART trains here have markings on the platform to delineate where the doors will be when the train stops.
I can move my navel from side to side without moving the rest of my body.
I can remember nearly anyone’s birthday. I have birthdays of people I barely know/dislike intensely stored in my brain. Tell me once and it almost never leaves.
October 10th. Now you have to get me something. 
I would LOVE to be able to do that.
I can clap with one hand, like Cecil mentioned in one of his books. Well, a reader wrote in about his skill at it.
I can walk on my hands, do the splits and do flicks.
Utterly useless, except for amusing myself.
Saving throws in AD&D. i ALWAYS guess odds or evens correctly. every time.
I can flare my nostrils rapidly, like a rabbit. Nothing else on my face moves, not even my nose, just my nostrils moving out and in.
I can “wag” my tongue side to side rapidly in my lower mouth. It makes a flapflapflapflap sound against my gums.
I can pop almost any movable joint in my body. I can pop almost all of my spine, even the thoracic vertebræ, though it takes a bit of contortion. I can pop my fingers and toes, my wrists and ankles. I can pop my knees and my jaw, too. And if I step on my foot right, I can pop my tarsals.
I sound like a case of toothpicks being run over by a bulldozer when I get up in the morning.
I’m also immune to poison ivy and can capable of sitting seiza for long periods of time without discomfort.