The boy was holding the door strongly

Walking the street, I found a school. Because it was in the middle of class, nobody played in the school field and the school was wrapped by the silence. I entered the field inadvertently.

In the meantime, some boys came out of the school building. It became a break time. One boy ran into a shed built in the field. And he took a ball there. Then, another boy came to the shed and started to hold the door not to open. The boy holding a ball wanted to go out and push the door. Yet he couldn't open the door because his friend held the door from outside.

I didn't know what these boys did. Anyway, both of them seemed happy. And I thought the recess would be ended in the course of jostling each other.