Why is waking a sleep walker considered dangerous?

i eat, cut my hair in my sleep

How shock would you be if you wake up and found that you'r standing in someplace and someone in your face? Some people don't have a heart strong enough for it.

Because you're more than likely to get your butt kicked by accident.

I should know. I've had that experience a couple of times by my wife in the past six years.

(Ouch!)