An employee was leading a horse from the field to the barn when the horse got away from him. He left the horse in the field to calm down. While he was closing the metal gate (8 feet wide and 4.5 feet high), the horse ran towards the gate and pulled it off its hinges. The gate fell on top of him and the horse ran on top of the gate and the employee. He suffered a brain injury and lost consciousness, requiring hospitalization.