Joker/Batman: In person at the Science Building
[For all the planning Joker did, he didn't put much work into this last step. He didn't need to! All the color and banners and fire in the world couldn't match the sparks between himself and the big old Batman. By his calculation (to be fair his math was usually a little off) the toxin would begin to wear out once Batman joined his clown prince in the science lab. And as the beautiful lust for murder burned out of his lungs, Batman would be faced with a choice.
Joker was in the lecture room, standing at the podium at the end of a slant of turned over, rotting desks. His skin was white again. When Batman appeared, Joker began his lecture. He had a skull in his hand.] To kill or not to kill! That is the question, Batman! [A giggle and he tossed the skull to the ground like it was nothing more than a child's plaything.] Tonight, we'll see if you can finally do what should be done. What you need to do!