Focus on the dot in the center, and move your head forwards and backwards. What happens?
China was the first country to introduce paper money (in 812), but it wasn't until 1661 that a bank (Banco-Sedlar of Sweden) issued banknotes.
"The Doc told me I had a dual personality. Then he lays an 82 dollar bill on me, so I give him 41 bucks and said, Get the other 41 bucks from the other guy."
-Jerry Lewis