Batman: The Long Halloween Issue 12 pg. 19

For those who read Batman: The Long Halloween, this is the page where the guard standing next to Jim Gordon is actually Batman in disguise! The Holiday Killer is on the loose and they have to move Sal Maroni to another prison cell, and in doing so, Sal Maroni gets shot and killed by one of the Holiday killers, Alberto Falcone, and then Batman comes busting out of his jail guard disguise and proceeds to beat the crap out of Alberto Falcone!