And it was fairly grotesque, with blood and tumors flying all over the place. Evidently, Frank was trying to show people that psychic surgery is a big scam. Psychic surgeons, in the Philippines, charge big bucks for no cure whatsoever. They are stealing money. But, they give cancer patients some peace of mind.
People come away feeling healthier.
Besides, some of the patients don't even have cancer. Many have cancer, but would benefit from normal medical methods, maybe living many productive years. The blood is often chicken blood, or some other kind of blood. The tumors are not tumors, but chicken livers, or blood-soaked cotton, or something else. Any magician can hide these things until he pretends to remove them from the patient's body.