AN: Seriously, I doubt that Jonathan deleted every little detail about Arkham when he...erm...quit. Not new, just moved.
Jonathan Crane has a lot of disadvantages. He's breakable, prone to pneumonia, and an insomniac-sometimes to the point of danger. But he has one crucial advantage over the other inmates.
He worked here. He has seen every single blueprint and wandered through every single room, even the falling-apart ones. Breaking out of Arkham is no picnic, but he has an easier time of it than the others. It helps that the passwords haven't been changed in years, and he remembers them all.
So when the Joker breaks out one evening and causes an absolutely huge to-do, Jonathan takes the opportunity to slip away from the mess hall and into one of the janitor's closets. This one leads to a walled-off portion of the building. He used to use it for testing, but now he'll use it to get out of here.
The dusty old rooms creak and groan as he walks through, as though trying to give him away. Ha! If anyone knows about this part of the asylum-he doubts it-they'll have a hard time getting in. Besides, there's other places to go.
He keeps extra clothes down here for times like this. Hopefully the rats haven't found them…ah! There they are. Nice and hole-free. He slips out of the orange jumpsuit and puts them on. They're soft against his skin.
There! The trapdoor that leads out under the grounds. Hopefully no one's up there…no. There's no voices or footsteps. He's safe.
He pushes the trapdoor open and clambers out onto the grass. Time to go home.
He jumps the wall and slips down the darkened alley, listening to the barking dogs. They may catch the Joker, but by the time they notice he's missing, he'll be long gone.
They haven't had time to move and he lets himself into the abandoned apartment without a sound. It's hard to believe it's only been four days since he was here last. The screams and laughter always disorient him.
"Kitty?" he calls. "I'm home."
THE END