
The story goes that he woke up to 'a bang' and found he had shot himself in the knee whilst sleepwalking.
But the thing is, if you were a sleepwalker why would you keep a gun accessible to yourself in your sleep?!
And another thing is that this guy wasn't even drunk or high, even though he does take medication for pain (I bet he'd need to up his dosage after this particular incident!).
But at least this guy isn't alone, it appears that loads of people have had unpleasant (though hilarious) gun experiences when they perhaps weren't paying quite enough attention...
Take Florida resident Daniel McDaniels (and yes that is his real name) for example; he managed to shoot himself in the FACE whilst trying to fight off a skunk.

So I think the moral of these stories is, if you're going to be stupid enough to own a gun, at least try to use it competently.
You can read more about these stories at:
http://abcnews.go.com/Health/SleepDisorders/colo-man-sanford-rothman-shoots-sleeping/story?id=11996668
http://www.thaindian.com/newsportal/world/daniel-mcdaniels-shoots-his-own-face-while-loading-rifle-own_100439551.html
http://www.wenatcheeworld.com/news/2010/aug/30/snohomish-man-shoots-self-in-buttock/