The plaintiff, while about to descend a flight of stairs from a second-story night club, was engaged in conversation with a companion and failed to survey the steps. An obstacle on the second step caused her to slip and fall, resulting in injuries. The state in which the night club was located adopted both the rules of comparative negligence and res ipsa loquitor. What impact might her negligence have on her lawsuit against the night club, what burden of proof would she have in her case,and what is the most likely legal outcome?