I think I laugh at everything because laughter is better than most reactions to some situations. If someone falls I crack up, (as long as they're not hurt... too bad lol). I laugh at my self a lot because I am such a clutz. My fiancee used to get so irritated with me when I would laugh when he would stub his toe or something. Now he laughs with me. It's just part of who I am. Anything can be funny if you look at it the right way.