For the exact same reason I restared in Pearl: nothing left to do.
A wizard wants to drop the same amount of rabbits at five different houses. To get to each house (including the first), he has to cross a magic river. Every time he crosses a river, the number of rabbits he has doubles. When he leaves the last house, he doesn't have any rabbits left. How many rabbits did he have to start off with (And no, it can't be zero)