Walking Corpse Syndrome: they believe to have died
It is a syndrome of mental depression and suicidal tendencies, in which the patient complains of having lost everything: possessions, part of or the entire body, often believing that he or she has died and is a walking corpse. This delusion is usually expanded to the degree that the patient might claim that he can smell his own rotting flesh and feel worms crawling through his skin. The latter phenomenon is a recurring experience of people chronically deprived of sleep or suffering amphetamine/cocaine psychosis. Paradoxically, being "dead" often gives the patient the notion of being immortal.
Jumping frenchman disorder: weird reflexes
The main characteristic is that patients are extremely startled by an unexpected noise or sight. It's not just twitching when someone sneaks up behind you. Patients with this disorder flail their arms, cry out and repeat words. First identified in some of Maine's lumberjacks of French-Canadian origin, the odd reflex has been identified in other parts of the world, too.
Blue Skin Disorder: the blue people
A large family simply known as the "blue people" lived in the hills around Troublesome Creek in Kentucky until the 1960s. They were the blue Fugates. Most of them lived past the age of 80, with no serious illness - just blue skin. The trait was passed on from generation to generation. People with this condition have blue, plum, indigo or almost purple skin.
Pica: the urge to eat non-food substances
People diagnosed with Pica have an insatiable urge to eat non-food substances like dirt, paper, glue and clay. Though it is believed to be linked with mineral deficiency, health experts have found no real cause and no cure for this disorder.