So I have double jointed thumbs as well as what my friend thinks is a Ganglion cyst in my wrist.
This thing is awesome!

It grows and shrinks on demand- seriously. A little tap on it and it grows and if I just gently rub it, it shrinks.
Hurts like a mother during Winter though and bumping it into something while its big kills but it's pretty cool.
You wouldn't really know it's there because it kinda just looks like that other bone in your wrist except it can sometimes looker really, really blue.

Anything weird about you?