Oh, I hate nightmares like that. I still get anxious thinking about the one where I electricuted my husband :-) I wasn't paying attention and plugged in a computer at the wrong time. I knew there was nothing I could do, he was dead, and came screaming out of that but was lying on my "good" ear so couldn't hear myself scream so got louder to wake myself up and was shaking my husband to make sure he was still alive (this is 7:00 on a Saturday morning :-) and so thoroughly woke him he had to get up but I fell back to sleep for a couple hours. I worked hard to wake myself up too, so I wouldn't go back into the dream.