Laughing in My Sleep

I have known for years that I talk in my sleep. I have always thought I only talked when I'm super tired, but I don't really know that for a fact. I attended a conference in Portland this week and shared a room with my co-worker Mandy. The first morning, she told me that I had been laughing in my sleep - well she actually used the words "cracking up". Wish I could remember my dream! What funny things do you do in your sleep?