I think I'll think twice about opening the window again.

Well... it all started when one of the kiddies was throwing a worksheet to a friend. I always tell them to pass and not throw things but they continue doing it.

He threw it too hard and the worksheet flew over his friend's head. Then, it went sailing out the window.

What followed was a moment of shocked silence followed by the class erupting into wild laughter. I struggled to get them to calm down, which was difficult.

I was laughing myself. XD