You and your class went on a picnic, your class walked through the forest and you and your classmate with whom you don't talk at all walked behind the whole class and viewed the beautiful landscape of the forest.

He accidentally tripped over a branch and fell, you started laughing with him because his fall was funny.

"Hey! It's not funny!"

He said gloomy,getting up from the ground but when he got up and you stopped laughing,you noticed that your class had already gone deep into the forest.