Think of anything in your head, once you have that thought, have Darth Vader try to read your mind. He will tell you that he does not care about spacific things, but I did it anyway lol. Most of the time he will guess what you are thinking of in a matter of several questions. But if you beat him to the point that he bails on you, then you are a true Jedi! Its really funny to play this simple mind game!