You're insane! [giggles]
Who: Gotham Merchants Bank Manager
The Joker has taken over Gotham Merchants Bank and captured its manager. By the time Batman arrives, the Joker has already poisoned her with Joker toxin, turning her into an incomprehensible, laughing wreck. After the captured Black Mask (Roman Sionis) exposes and ruins the Joker's plans, the Clown Prince of Crime angrily beats him into submission for not "play[ing] along", then reveals himself in front of Batman. The manager barely manages to deliver these last words through the giggling before the Joker blows up the vault as Batman barely escapes with her. By the time he regains consciousness, he sees that the manager is already dead, a victim of the Clown Prince of Crime.