America's Finest News Source discusses Post-Melodramatic Stress Disorder (PMSD).
According to this article, "PMSD sufferers walk through their days with the specter of an unnecessary musical number hanging over them like a mask. The prelude is constantly playing in their unconscious minds, threatening to crescendo into exaggerated, choreographed action at any moment. Anything can set them off: a chandelier, a strain of saccharine music, a gaudy outfit."
A psychiatrist quoted in the article urged loved ones to watch possible PMSD sufferers closely and seek professional help if necessary. While PMSD isn't a new phenomenon, the magnitude of the current outbreak is unprecedented.