1. humans only ate apples (or some other sort of food, but only one thing)?
2. humans kept cannibals as pets, and their pets kept trying to find ways to eat them (or each other)?
3. people had a universal but very unusual way of greeting each other?
4. scientists knew all the answers?
5. someone who could accurately imitate your voice phoned people pretending to be you?
6. glass had never been invented?
7. every window shattered?
8. you got the surprise of your life?
9. the police were looking for the wrong man (or woman)?
10. everyone had to work for at least one month in every country in the world?