Frasier is becoming fed up with his father playing tricks on him, and mocking the effeminate scream that his pranks provoke. It happens that Frasier is treating a patient who has the rare condition of coulrophobia - fear of clowns. Part of the treatment he has planned is to dress up as a clown, so he has a very comprehensive costume. In a bid for vengeance on his father, Frasier disguises himself as a clown, which Martin hates. After Frasier jumps out at him wearing the outfit, Martin has a heart attack and is hospitalized. This spurs Martin to propose to Ronee while recovering.