Sleep disorder creates 'Mr Hyde'

I found this article to be quite interesting.

A quiet night's sleep is not an option for Derek Rogers or his wife - because he turns from a mild-mannered "Dr Jekyll" by day to a "Mr Hyde" by night.

Mr Rogers, 70, from Bedford, has a rare sleep disorder which causes him to become violent when he sleep-walks.

He has destroyed furniture, attacked his wife and injured himself during the night - but remembers nothing.

news.bbc.co.uk...

There is one thing thou, Rogers was born in south-Africa, we know that there are some drugs used in rituals in regions of Africa which cause a "zombie like trance on people". I wonder if there is a connection here.