Why did the boys chase the 5 year old boy?

From the text:

One evening we actually chased a little boy who was eating two boiled ears of corn by himself. He was about five years old and was enjoying the corn that he held in both hands, taking turns biting each ear. We didn’t say a word or even look at each other. Rather, we rushed on the boy at the same time, and before he knew what was happening, we had taken the corn from him. We shared it among the six of us and ate our little portion while the boy cried and ran to his parents.