A civil engineering expert witness for the plaintiff opines on a case happened in Arizona involving a slip and fall accident. The plaintiff, a forty-year-old woman, was shopping with her son in a grocery store. When she was searching for cheese in the refrigerated case, she slipped on some spilled soup and fell. She suffered a serious injury and required medical treatment. The son said that after he saw his mother lying on the floor, he noticed soupy footprints leading away from the spill, as though other customers had stepped in it. The store asserts that an employee had just walked through the area minutes before the incident and the floor was clean and dry. The location of the spill was about 35 feet from where store employees were providing customers with soup samples in small cups without lids.