Any patron of a restaurant, grocery store, or really any business at all has a reasonable expectation of safety. They shouldn't have to watch every step they take while they are trying to spend their money on goods or services. It is exactly because of this that companies that fail to protect their patrons and uphold safety statutes should be held accountable for their negligence.
One example of this is a man who tried to enter a McDonald's. He was trying to go inside the fast food restaurant when he slipped on a greasy spot. He fell and suffered numerous injuries that, to this day, still plague him. He suffers from neck pain, arm pain and back pain.