Ever since I was a teenager I would "depersonalize" and feel like I was outside of my body. Like I would stare at my legs and they would look small and separate from myself. Really it started before that but the leg thing started then. Apparently this was supposed to be scary but I guess that's only for people who are used to feeling in things. It got even stronger when I would smoke pot and lay on the floor feeling like I was floating above my body. I guess it's why I enjoy sports that leave bruises, or something like pottery which requires a surprising amount of physical "with-itness". One form of meditation I find I like is called body scan meditation because it seems like the whole point is feeling in your body. I just do that and fall right asleep.