This document discusses negligence related to dangerous articles and machinery. It notes that innocent-looking items can cause harm if mismanaged, and lists examples like footballs, gas cookers, and drills. Manufacturers and users of dangerous machinery have a duty to take precautions. Case law establishes that there is a duty to take extra care with dangerous items, and that manufacturers are responsible for products that harm customers. The document also examines the doctrine of imputability, where the negligence of one person like a driver can be attributed to others like passengers, though exceptions have been made for family members.