Just a quick one.
UK banknotes, say the 10 pound one write on them: "I promise to pay the bearer on demand the sum of ten pounds", signed by the chief cashier of the Bank of England.
So haven't you ever wondered, 10 pounds of what?
And the answer is that the phrase means gold. So technically you can go to the Bank of England and say: "Hi, I came across this receipt, can I have some of my gold please"
But here is the funny bit, apparently you can't. It doesn't apply any more, one nice day they simply said "nah, j/k, lol" for all the banknotes simultaneously. The fun bit is that they still write it though.
B...but you proooooooomised.
