Rocky is an 89 pound Doberman. One day, he escapes his owners’ enclosed yard and bolts towards a 61 year-old cyclist, knocking him from his bike. The cyclist suffers injuries including broken ribs and a fractured clavicle. Due to his injuries, the cyclist is unable to work for several months.

Prior to the incident, Rocky had never bitten a human and even played with the owner’s young children. However, Rocky had run towards passing cyclists in the past showing signs of aggression within the constraints of the owners’ electric fence.

The system was never tested and failed the day Rocky escaped.