Can you breathe while unconscious

Answer 1

there is always the possibilty of dying of anesthesia

Answer 2

No, but you may die from whatever put you in a coma.

Answer 3

Yes! You're only unconscious but not dead :-)

Answer 4

Yes . . . if you walk off a roof or a cliff. Mostly, though, sleepwalkers are aware at some level of what they are doing, and the subconscious brain keeps them safe. Mostly.