Riddle: A ship sank in perfect weather. If the weather had been worse the ship probably would not have sank. What happened?
Answer: The ship was the Titanic which hit an iceberg on a flat sea. If the weather was worse the ship's lookouts would have seen the waves hitting the side of it or heard it(icebergs make groaning noises when they move). Unfortunatly the iceberg was not seen and the rest is history.