Einstein, Pascal and Newton were playing hide-and-seek. Einstein counts, Pascal goes away, but Newton stands next to Einstein, draws a square 1 x 1 m and stands in the middle. Einstein looks at him and says "found you", but Newton replies: "No, you've found Pascal".
[If one remembers, - The name pascal was adopted for the SI unit newton per square metre (N/m2) i.e. Pascal is Newton per square meter]