I don't really know if this is true, but some people tell me that, around halloween, they've been seeing Herobrine. Again, I don't know if this is true, but it seems a likely theory that Notch might have added Herobrine secretly for halloween and removed him afterwards. If this is fake, again, it is a really likely theory, but if this is true, boy it would be fun to go out Herobrine hunting in Halloween night. :3