Before you click, let me explain what it is.
It is a flash application that will guess the number your thinking of, no matter what.
1. You pick any 2 digit number on the list and add the digits together. (ex: 34 = 3 + 4 = 7)
2. Subtract the number you get from the original. (ex: 7 - 34 = 27)
3. Then click the orb on the right, and it will guess the symbol that is beside the final number you have.
Isn't that amazing?
And yes, you will spend quite a while trying to figure out how it does it, but once you do figure it out, it is very simple, but complicated at the same time. ;)
Edit: Anyone who has already seen it, don't tell anyone how it works ;)