Let's say that the Joker has walked into a heavily-crowded bank and is killing one hostage per minute, with a functionally unlimited number to kill, and Batman is the only one who can stop the Joker. Let's also say that while Batman is on his way to this bank, he spots a man strapped to a bomb, and this bomb won't kill anyone other than this man. It will, however, take three to five minutes to disarm. It will detonate as soon as Batman decides to leave it alone to stop the Joker. What would Batman do and what should he do?