What is the test for a directed verdict in a personal injury case?

proceedings of the court, jury or adverse party, or any order of the court or abuse of discretion" preventing a fair trial (id., subd. (1)), and when "the verdict or other decision is against law." (Id., subd. (6).)⁴ A decision is against law under subdivision (6) if it is unsupported by any substantial evidence such that a directed verdict would have been justified against the party in whose favor the verdict was returned. (Sanchez-Corea v. Bank of America (1985) 38 Cal.3d 892, 906.)