And that is precisely why these sleepwalkers can murder their cats and wives, because their brains don't know their victims.
And in addition to being "nice people" during their waking hours, sleepwalkers like Falater, have one other trait in common.
"They are overly meticulous, maybe a little bit OCD [obsessive-compulsive disorder]," said Cartwright. "They are doing something good, but then when someone stops them, they turn violent."
If you or a loved one experience sleepwalking, doctors suggest finding a sleep clinic to determine the extent of the parasomnia. Specialists can recommend stress-reduction techniques and medications that can help the disorder.
You can find help at these Web sites: Sleep Health Centers and at the Rush University Medical Center Sleep Disorders Service and Research Center.