Joker: (Answering his phone) Hello, hello? Give me the sign.
Susie: How do you stop a dog from barking in July?
Joker: Countersign. Shoot him in June. Very good. (laughs)
Susie: Listen, Batman and Robin just drove into the parking lot.
Joker: What?! The Dynamic Duo at school?
Susie: That's right, Joker. What'll I do, take it on the lam?