A few days ago Peter decided to cook a meal for his friends. He opened his fridge but there was nothing in it. Then Peter took his pen out of his bag and a slip of paper off the shelf and started to write a shopping list. He stopped from time to time to think and then went on writing. With this list Peter went to the supermarket that was three blocks away from his home. On his way he saw a black cat running across the road but he thought nothing of it. When he was walking into the shop he realized that he had left his wallet at home, somewhere between the books on the shelf above his desk. “Things happen!” he thought and went back home to take the wallet.

Half an hour later, in the shop he took a shopping trolley and started looking for all the items on his list. The first thing to buy was pasta. When he was reaching out for a pack of pasta, his slip of paper with the shopping list fell out of his hand and slowly flew under the lowest shelf. Peter spent fifteen minutes on all fours looking for it but the list was gone. That became the final nail in the coffin of his patience. Peter left the trolley and went to the nearest café to have lunch.