Two accountants are waiting in the queue in a bank, when suddenly a gang of armed robbers burst in and order everyone onto the floor.
While several of the robbers take the money from the tellers, others line the customers, including the accountants, up against a wall, and proceed to take their wallets, watches, jewellery and anything else of value.
While this is going on, the first accountant jams something into the second accountant’s hand.
Without looking down, the second accountant whispers to the first, “What is this?”
The first accountant replies, “it’s that £50 I owe you”.
Image used under a Collective Commons License from: https://svgsilh.com/image/160157.html