There's a guy who come into the store where I work that apparently has the power to make any pen not work for him and him alone. Pens never write when he is trying to sign credit slips, but the same pens work fine for everyone else. Freaky and useless.

The ability to, without a mirror, see your own ear.

And lick your elbow!

Though those might be secondary effects of being fantastically elastic.

The ability to calculate pi to it's final digit.

It's 4.

You're welcome.

10/10 for humor.

The ability to instantly forget anything, no matter how important, traumatic or memorable.

You already wished for that one. Try again.

The ability to see all dust particles that collect on cutlery specifically.

The ability to change jpg files to bmp files, without having to click "Save as...".

The ability to count the RPMs of ceiling fans, box fans, and other residential-use air moving devices.