The Joker just laughed and grabbed the Batman's wrists, pressing a little harsher than necessary - like he was trying to get Batman to let go. At this position, he could fall backwards into the sky and it would be the Batman who killed him, and the temptation was so great...

"I just sent a message. One that looks to have gotten through clear as day." He grinned into the Batman's face, "You knew it had to happen, everyone knows that I'm going to keep doing this and we were so overdue for another get-together, Batsy. I just, uh, wanted to give Gotham a little fireworks display."