Sennz0r said:
If you're aiming at people who can't sleep but at times just walk around without knowing what they're doing: No I haven't met anyone who did, and you've been watching House.
If not, then someon eneeds to explain the term narcoleptic to me.
Narcolepsy: Narcolepsy is a neurological condition most characterized by Excessive Daytime Sleepiness (EDS), in which a person experiences extreme tiredness, possibly culminating in falling asleep during the day at inappropriate times, such as at work or school. A narcoleptic will most probably experience disturbed nocturnal sleep, which is often confused with insomnia, and disorder of REM or rapid eye movement sleep. It is one of the dyssomnias.
^^ Wikipedia's take on it
I seem to think Muhammed Ali has Narcolepsy