Albert Einstein, Isaac Newton and Blaise Pascal decide one day to play a game of hide and seek. They decide Einstein is "it", so he covers his eyes and starts counting while Newton and Pascal hide. Pascal immediately runs off to find a good hiding spot, but Newton simply stands there and draws a medium-sized square around himself.
When the count is up, Einstein uncovers his eyes, sees Newton and says, "Newton! I found you!"
To which Newton replies, "No, you found one Newton per square meter. You've found Pascal."