One morning, Tom and Bob decided to ride their bikes to the beautiful park. Tom didn't want to wear his safety helmet, but Bob did. At around half past nine, they arrived at the park with their colourful bikes.

Suddenly, a big dog chasing a small cat crossed their path. The boys were cycling very fast and fell on the ground when they tried to stop their bikes abruptly. Bob didn't get hurt, but Tom got badly injured. A park attendant called their family and Tom was taken to the hospital.

Tom's family visited him every day. They told him to wear his safety helmet the next time he went out with his cool bike. Tom promised that he would wear it. At noon, on the day he left the hospital, they went to celebrate and gave him a treat.