One day, there were a few friends playing in the park, when abruptly their yellow ball fell into a hole. They tried to get it back by enlarging the hole in the ground. One by one, they gingerly crawled in but they couldn't find their ball. Remarkably, one of them found an alleyway behind some rocks. Travelling down, the boys noticed that the soil beneath them became damp. Suddenly, they realised they had discovered an oil well. Quivering with excitement, they bickered selfishly among themselves knowing they could earn lots of money. However, none of them were ever seen again.