Most people are incapable of this action as they tend to snicker or jump up and down screaming "FUCK YEA I'M SO GOING TO KICK YOUR ASS WITH THIS 'GET OUT OF JAIL FREE CARD' WHEN IT'S MY TURN AGAIN YOU FUCKING PUSSY!"
"Hmhmm, that's some pokerface he's got."
(Lady GaGa's song) similar expression used to prevent giving away one's motives, feelings, or situation. Like in that song when she pretends to like the guy but she's actually thinking about girls.
Lady GaGa's song) can't read my, can't read my, no he can't read my poker face.