In Huffman v. City of Poway (2000) 84 Cal.App.4th 975, the Court implicitly accepted the application of the doctrine to a theater actor who was injured when he fell through a trapdoor on the stage. The Court concluded the trial court properly rejected the application of the defense because substantial evidence supported its finding that the defendant stage owner "increased the risks beyond those inherent in" performing on stage by failing to adequately mark the trapdoor. (Id. at p. 995.)