The elderly plaintiff slipped and fell on an elevated walkway adjacent to the parking lot of a seniors’ centre owned and operated by the defendant. The plaintiff attributed the cause of her fall to the absence of a yellow caution line demarcating the walkway from the parking lot. The plaintiff’s human factors expert concluded that the edge should have been marked by a cautionary line. The court dismissed the action, finding that the plaintiff’s expert liability evidence was not particularly helpful as it provided an opinion on a matter that does not require specialized skill or knowledge.