Can you faint while you are sleep walking?

What can cause sleep walking?

• So, I woke up today on my front lawn... In my underwear... Fortunately, I think I woke up early enough that nobody saw me, but I am still curious how this could have happened. I do not take any sleep aids, though I did have a glass of wine before bed. I am doubtful that a few ounces of wine alone could have caused this. Especially considering it is a nightly ritual of mine and this has never happened before. I had a dream that there was some threat in my bed room, and I had to get away from it, but could a dream alone motivate me to leave my house without waking up? If so, how can I keep this from happening again?

• Answer:

  I rode my bike across town in very little clothing in my sleep when I was about 13 while sleep walking. I am glad that stuff stopped.