Landlords used to delay payment to people who built and repaired houses or even booted them out without money. But the builders came up with an uncommon move, which immediately made the landlords pay them in full. What did they do?
When laying a foundation for a house or repairing it, they put a raw egg in a certain place. After a while, it began to rot. If the landlord called the builders and paid for their work, they took the egg away. If he booted them out, the egg eventually began to stink, and it was very difficult to find where it had been hidden.