The Clock Struck

Commissioner Gordon handed Batman the note.
“At half-past twelve, the clock stuck three,” said The Caped Crusader.
“What does that mean?” growled Chief O’Hara.
“I don’t know,” said Batman. “But it’s almost twelve-thirty now.”
Across the street, an explosion rocked the First City Bank Tower.
All three ran to the window, just as the building’s massive clock broke from its moorings and crashed through the office.
Batman. O’Hara. Gordon.
Dead.
Later that evening, Riddler and Joker divvied up the loot.
“I told you it would work,” said the Clown Prince Of Crime. ”Hey, let’s go kill Superman.”
They both laughed.