Test of causation in negligence making the defendant liable for damage that is reasonably foreseeable even if unexpected. The defendant ‘takes his victim as he finds him. In Smith v. Leech Brain & Co. (1961) an employee suffered a burn on the lip when splashed by molten metal. Cancer ensued at the site of a burn because of a pre-cancerous condition. The defendants were liable under the rule as liability turned on foreseeability in regard to the type, not the extent, of the injury.