Poison is the scariest of these because it's the least predictable. It works fast, and it could come from anywhere--an apple, a sword, a battle of wits with a Sicilian. But most of all, all the animals with poison--spiders, scorpions, tree frogs, and snakes. God forbid you get bit by a snake. According to all those books with "fun facts" meant to appeal to boys, a bite from a rattlesnake will kill you in fifteen minutes. And it turns your leg huge and purple. And there you are, lying in the sun, dying, with fifteen minutes to live.