Nightwing shook is head and dropped his feet again and pulled up the list of current inmates at Arkham.
"It wasn't as simple as a mass case of vertigo." Not that that was exactly simple. "They all felt it, according to the guards, but after . . . When I got there, Two-Face was helping the guards with their emergency plan." Which, considering that his therapy usually saw some results, at least at first, wasn't necessarily completely out of the question (at least as far as Batman was concerned).
But that wasn't the most surprising part; Nightwing pulled a coin from his gauntlet, one that anyone who had lived in Gotham City in the past decade or so would recognize.
"I found this on the floor of his cell," he said, flipping the coin to Robin. "He saw me pick it up and didn't even flinch when I left."