I dunno, It's crossed my mind a lot on what it would be like to be a zombie.
I've always thought it'd be the same way as dying. You die what not, what ever preference of after life you have. But in reality, your body reanimates and goes around om nom noming on people's faces. Maybe if you're a spirit, you could see your reanimated corpse go around, bang aimlessly on windows and rip off people's faces until you get bored of it or something.