I believe there is something after life, wether it be heaven, hell, or just screwing with other people when you die (I think that would be pretty fun, actually.) But I have never seen a transparent dead person walking around. I swear on my life I've heard voices, completley audible voices though. Men, women, children (I know I'm a friggin phsyco.) But on one occasion I swear I saw a little girl in a white dress, maybe 4-5 years old, walk across my computor room one night.

So yes, I guess I do.