Duke and Jason have been banned from being anywhere near each other in costume because the arguments they will break out into is both too intense and too distracting for patrol. Everyone thinks they're serious but after the first 10-20 times they do it for the love of the game.
Duke: Shut the fuck up.
Jason: You shut the fuck up.
Duke: Zombie
Jason: Flashlight
Duke: That's why the joker still alive
Jason: That's why the joker did what he did to ya mom.
Duke: Nigga where ya mom at? Dea—
Bruce over the comms who, along with the entire bat family has been listening to entire thing: Signal, Red Hood! SPERATE! NOW!
They are now giggling as dick and cass drag them apart.