My mom is a notorious sleepwalker/talker, and she also experiences sleep paralysis and hypnic jerks. It also takes her about 10 seconds or less to fall completely asleep (not an exaggeration either). My dad and I think she must have some kind of sleep disorder, but she doesn't think she needs to see a doctor for it. When she sleepwalks, she walks around the house and sometimes feeds the cat. When she sleeptalks, she swears like a sailor, which is completely out of character for her.
I sleepwalked once when I was 9 years old. I went up the stairs to my parent's bedroom, stood in front of them, and kept saying "no, no, no" over and over. My parents guided me into bed with them. When I woke up the next day, I was confused as to how I ended up there because I clearly remembered that I'd fallen asleep in my own room.
A few days ago, I came home after having a root canal on one of my teeth and went to sleep. My brother came into my room to use the computer, and I started laughing and said "Isn't it funny when I ate the food?" and my brother said "What are you talking about? You didn't eat anything; you've been asleep!"