Ferrari v. Grand Canyon Dories (1995) 32 Cal.App.4th 248 – represented the sponsor and conductor of a white water rafting trip that obtained summary judgment in the trial court by utilizing the primary assumption of risk defense. The Third District Court of Appeal upheld the decision in favor of the clients by holding that the conduct of the sponsor did not increase the risks inherent in the white water rafting activity. This case provided a substantial development in the primary assumption of the risk doctrine in the State of California.