Bats Aren't Rodents, Dr. Meridian (Batman Forever)

Commissioner Gordon: [about Two-Face] Can we reason with him? He's holding innocent people hostage up there.

Dr. Chase Meridian: He'll slaughter them without thinking twice.

Batman: Agreed. A trauma powerful enough to create an alternate personality leaves the victim-

Meridian: [interrupting] -in a world where normal rules of right and wrong no longer apply.

Batman: Exactly.

Dr. Meridian: Like you. [off his look] Well, let's just say that I could write a hell of a paper on a grown man who dresses like a flying rodent.

Batman: Bats aren't rodents, Dr. Meridian.