I was recently asked by a friend if I could help him with a project he was working on. Rather bluntly, I told him I'd help him when pigs can fly. Sadly a curious combination of his determination, large quantities of helium and a rather startled pig forced me to come to his aid. So I wonder, if pigs were to sprout wings and fly, or Hell decides it feels like freezing over; what half-forgotten promises would you suddenly be forced to keep?