One day Mary took her baby sister for a walk up the street. Her sister still had to ride in a stroller. Mary saw her friend Linda. She yelled to Linda to wait for her. So Mary made her way up the hill. Once she finally got to Linda she started to talk to her. Suddenly her sister in the stroller started to roll down the hill.
"Mary! Your sister is rolling down the hill! Hurry go get her!!!" said Linda. Mary said very calmly and confidently, "Don't worry about it. There's a stop sign at the bottem of the hill."