At a candy store…
Clerk: Oh, we don’t accept… *carefully examines bill* “Bat-dollars”, sir.
Damian: That is the most powerful piece of paper in the world! Of course you’ll accept it. Accept it.
In which it dawns on Damian that his brothers have been shi**ing him the whole time (and that Jason and Tim better hide – and hide well – if they want to stay alive).