Full coverage of SMS, Tonight at 10/9c on IFC. Shaken Manchild Syndrome (SMS) is a dangerous form of injury inflicted by violent shaking on idle, out-of-shape, adult male children who still live at home. SMS can result in severe head trauma, retinal hemorrhages, bone fractures, and choking if the manchild has some Milk Duds or a chicken nugget in his mouth at the time of shaking. Approximately 25% of manchildren diagnosed with SMS die and about 80% of the survivors can suffer neurological damage that will make them even more slothful than they were before. Things you can do to prevent yourself from shaking your manchild: 