One Two Three You Don't Know About Me

This sentence is used by magicians on live shows when they vanish on air behind a curtain

Also by kids when they hide at home behind a sofa. ahh childhood...how i miss those times.

Now gief pvpz!

Edited: Found useful to say this achievement is nerfed next 4.1. Will only require 2 bases instead of 3!

Acheivement name may also be a reference to the Britney Spears song "3" where the lyrics fit with the name of this:
http://www.youtube.com/watch?v=oTs6oQx1WJY&feature=player_embedded
One, Two, Three, Not only you and me (the lyrics)
One, Two, Three, You don't know about me (the achievement)
Just guessing though.

One, two, three, you don't know about me.
Four, five, six, my team's a bunch a' pricks.
Seven, eight, nine, all your bases are mine.
Ten, eleven, twelve, no more places to delve (into)

*It's rather hard to find a rhyme for twelve in this context :P