One day, a team of four friends went to the park to play. They were very happy. But one of the friends, Sam, was nervous. He saw a big dog and started to tremble. His friends asked, "Why are you scared, Sam?"
Sam said, "I am scared of the big dog. I think it will bite me." His friends told him, "Don't be scared. We will help you."
But Sam was still nervous. The big dog came closer and closer. Sam's friends tried to help, but they were too small. The big dog bit Sam and ran away. Sam was hurt, and his friends were sad. They knew they should have been more careful.
