You’re never far from a rat in London.
Cracking your knuckles gives you arthritis.
You can see the Great Wall of China from space.
Toilet doors are dangerous.
Fish have short memories.
Chewing gum stays in your body.
A duck’s quack doesn’t echo.
Nails and hair continue to grow after you die.
A coin thrown off the Empire State Building could kill someone.
The five-second rule.