I received this rather nerdy joke. Both SO and thought it was majorly funny and that again tells you something about us.
Einstein, Newton, and Pascal are hanging out one afternoon. Einstein is bored, so he suggests that they all play hide-and-seek. The others agree, so Einstein begins counting. Pascal runs off right away to find a place to hide, but Newton merely takes out a piece of chalk and draws a mid-sized square on the ground. He finishes the square and steps in the middle of it just as Einstein finishes counting. Einstein opens his eyes and immediately spots Newton standing right in front of him. He says, “I found you, Newton!” Newton replies, “no, you found one Newton per square meter–You found Pascal!”