After Orin finishes with his masochistic patient, Arthur Denton, who had requested "a long, slow, root canal", Seymour draws a revolver on Orin, but cannot bring himself to use it. Orin, who abuses nitrous oxide, puts on a type of venturi mask to receive a constant flow of the gas, but breaks the valve, and Seymour watches as he asphyxiates. Seymour dismembers Orin's body and feeds it to Audrey II, which has grown to enormous size, but is unknowingly witnessed by Mushnik, who flees in fear.