What is the test for a motion to overturn a jury verdict in a personal injury case?

"The trial court may grant a judgment notwithstanding the verdict only if the verdict is not supported by substantial evidence. The court may not weigh evidence, draw inferences contrary to the verdict, or assess the credibility of witnesses. The court must deny the motion if there is any substantial evidence to support the verdict." (Begnal v. Canfield & Associates, Inc. (2000) 78 Cal.App.4th 66, 72.)