Talk to the hand

Last night, the boy asks the hubby to hold out his hand towards towards his face and to say "talk to the hand". Now, I've been know to throw a little attitude around, but it's one of those do as I say, not as I do situations and it irritates me to hear it coming from my kids. Anyway, daddy obliges and when the boy gets the hand in his face and hears "talk to the hand", the boy responds with "Hi hand! How are you doing?".