"A Death in the Family" part 3
Death of Robin, Jason Todd, killed by the Joker
Batman #427 ended on a cliffhanger that placed Jason Todd in the blast zone of an exploding warehouse
DC set up a poll for readers to cast their vote of whether Jason Todd should survive the blast by calling one phone number, or die by calling another
10,614 phone calls were made with Todd's death having been decided by only 72 votes more than the opposite outcome where he would've survived
DC had prepared both scenarios to go to print (tap cover and swipe to view unpublished pages)