…from my physics teacher: Einstein, Pascal, and Newton were playing hide and seek, and it was Einstein’s turn to seek, while the others were hiding. While Pascal went to hide, Newton just sat out there in the open, drawing a square around him. So Einstein found Newton first. “Found you,” he said. But he was confused as to what Newton was doing out there in the open. So he asked, “We are playng hide and seek, you are supposed to hide. Why are you sitting out here in the open?” But instead Newton replied, “You didn’t find Newton, I drew a meter squared around me, so you found Pascal!”
You get bonus geek point if you understood this joke.